Physics horizontal projectile experiment demonstration device

Abstract

The invention belongs to the technical field of experimental equipment, and particularly relates to a physics horizontal projectile experiment demonstration device which comprises a horizontally-arranged operation platform and a projectile mechanism installed on the operation platform, and the projectile mechanism comprises a guide groove, a percussion assembly and a detection assembly. The guide groove is horizontally fixed on the operation platform and is used for horizontally guiding the movement of the small ball; the percussion assembly comprises a tension bar, an impact part and an ejection part, the tension bar is parallel to the guide groove and is in sliding connection with the guide groove, and the impact part is arranged in the guide groove and fixed to one end of the tension bar; the ejection part is arranged between the tension bar and the operation platform and is used for driving the tension bar to drive the impact part to impact the small ball; and the detection assembly is arranged on the operation platform and is used for detecting the elastic force of the ejection part. According to the device, the initial speed of the small ball can be more accurately controlled, experimental errors are reduced, and a more accurate horizontal projectile motion rule is obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of experimental equipment, and in particular relates to a physics horizontal projection experiment demonstration device. Background Art

[0002] In the teaching of physics, horizontal projectile motion is an important knowledge point. In order to enable students to understand and learn intuitively during the teaching process, teachers will use the horizontal projectile experimental demonstration device to conduct on-site demonstrations to help students better understand the laws of horizontal projectile motion.

[0003] Traditional horizontal projectile experimental demonstration devices are often simple in structure, consisting of only an inclined track and a horizontal table. After the ball rolls down the inclined track, it performs horizontal projectile motion on the horizontal table. During operation, due to the change in the direction of the ball's movement at the junction of the inclined track and the horizontal table, there will be a certain resistance when the ball contacts the table, reducing the speed of the ball. The magnitude of the resistance is related to the initial speed of the ball, which is difficult to calculate, so the initial speed of the ball cannot be accurately controlled, resulting in large errors in the experimental results, and it is impossible for students to fully understand the laws of horizontal projectile motion and its influencing factors. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the purpose of the present invention is to provide a physics horizontal projectile experiment demonstration device, which can more accurately control the initial velocity of the ball, reduce experimental errors, and obtain more accurate horizontal projectile motion laws.

[0005] The technical solution of the present invention is:

[0006] A physics horizontal projection experiment demonstration device comprises an operating platform and a projection mechanism installed on the operating platform, wherein the projection mechanism comprises:

[0007] A guide groove, horizontally fixed on the operating platform, for horizontally guiding the movement of the ball;

[0008] The firing assembly comprises a tension rod, a striking part and an ejection part, wherein the tension rod is parallel to the guide groove and the two are slidably connected, the striking part is placed in the guide groove, and the striking part is fixedly connected to one end of the tension rod, and the ejection part is arranged between the tension rod and the operating platform, and is used to drive the tension rod to drive the striking part to impact the ball;

[0009] The detection component is arranged on the operating platform and is used for real-time detection of the elastic force of the ejection part.

[0010] Preferably, side grooves are provided on the two opposite side walls of the guide groove, and the side grooves penetrate the side walls of the guide groove. The two side grooves are arranged opposite to each other, and a sliding rod is slidably connected in each of the two side grooves, and the opposite sides of the two sliding rods are fixed to the tension rod or the impact part, and the two sliding rods are connected to the ejection part.

[0011] Preferably, the ejection unit comprises:

[0012] A positioning plate is mounted on the operating platform, a through hole is formed on the positioning plate, the guide groove and the tension rod are both arranged through the through hole, and the side of the positioning plate facing the impact part is perpendicular to the tension rod;

[0013] Two guide rods corresponding to the two slide rods one by one, one end of the guide rod is fixed to the corresponding slide rod, and the other end is inserted through the positioning plate;

[0014] Two compression springs correspond to the two guide rods one by one. The compression springs are sleeved on the corresponding guide rods, and one end of the compression spring abuts against the slide rod, and the other end is fixed to the positioning plate.

[0015] Preferably, a row of balls is arranged on each inner side wall of the guide groove at equal intervals along the length direction.

[0016] Preferably, the detection component comprises:

[0017] A first scale ruler is arranged along the length direction of one of the guide rods, and the first scale ruler is embedded and fixed in the guide rod;

[0018] A collection module, arranged on a side of the positioning plate away from the compression spring, and used for collecting values ​​on the first scale close to the positioning plate;

[0019] The data processing system is used to receive the data from the acquisition module and calculate the elastic force of the compression spring.

[0020] Preferably, a first telescopic rod is fixed to a side of the positioning plate away from the compression spring, the first telescopic rod is parallel to the guide groove, a second telescopic rod is fixedly connected to a side of the first telescopic rod away from the positioning plate, the second telescopic rod is perpendicular to the first telescopic rod, a pull block is mounted on the output end of the second telescopic rod and the two are movably connected, and the pull block is fixed to one end of the tension rod far from the impact portion.

[0021] Preferably, the operating platform is provided with a movable groove in a direction parallel to the guide groove, the positioning plate is slidably connected to the movable groove, and the positioning plate and the guide platform are fixed by a first locking member, and a second scale ruler is embedded and fixed in the movable groove.

[0022] Preferably, two stabilizing plates are arranged between the movable seat and the operating platform, and the two stabilizing plates are arranged opposite to each other on both sides of the operating platform. The operating platform is slidably connected to the two stabilizing plates, and the stabilizing plates and the operating platform are fixed by a second locking member.

[0023] Compared with the prior art, the physics horizontal projection experiment demonstration device of the present invention has the following beneficial effects:

[0024] When the device is conducting a horizontal projection experiment, the operating platform is adjusted to be placed horizontally, that is, the guide groove is in a horizontal state, and then the ball is placed in the guide groove, and the ball is moved to a position that fits the impact part and remains stationary, and then the tension rod is pulled to compress the spring. At this time, the tension rod drives the impact part and the ball to generate a launching distance, and the detection component is used to observe the tension of the launching part. After the elastic force of the launching part reaches a predetermined value, the tension rod is released, and the impact part hits the ball under the elastic force of the elastic member, generating an initial velocity for the ball, and then the ball rolls along the horizontal guide groove and is thrown out from the end of the guide groove to realize the horizontal projection demonstration. Compared with the existing experimental method of inclined guide rails and horizontal desktops, the above method can effectively utilize the elastic force of the launching part to realize the precise control of the initial velocity of the ball during the experiment, and reduce more resistance effects, ensure the stability of the ball velocity, and have a smaller experimental error, thereby obtaining a more accurate horizontal projection motion law. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the overall structure of the first viewing angle in an embodiment of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the ejection mechanism in an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the overall structure of the second viewing angle in an embodiment of the present invention;

[0028] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 5 It is a structural schematic diagram of the ejection part in an embodiment of the present invention;

[0030] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0031] Figure 7 is a transverse cross-sectional view of a guide groove in an embodiment of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure of the leveling assembly in an embodiment of the present invention.

[0033] Description of reference numerals:

[0034] 1. Operating platform; 2. Guide groove; 3. Tension rod; 4. Impact part; 5. Ejection part; 51. Positioning plate; 52. Through hole; 53. Guide rod; 54. Compression spring; 6. Detection assembly; 61. First scale scale; 62. Acquisition module; 63. Data processing system; 7. Side groove; 8. Slide rod; 9. Ball bearing; 10. First telescopic rod; 11. Second telescopic rod; 12. Pull block; 13. Leveling assembly; 1 31. Fixed seat; 132. Movable seat; 133. Telescopic part; 1331. Stud; 1332. Screw sleeve; 1333. Elastic block; 134. Level; 14. Moving groove; 15. First locking piece; 16. Second scale ruler; 17. Stabilizing plate; 18. Second locking; 19. Moving frame; 20. Positioning part; 21. Laser speed meter; 22. Box; 23. High-speed camera; 24. Entrance hole. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0037] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] See also Figures 1 to 5As shown, in order to more accurately control the initial speed of the ball, reduce the experimental error, and obtain a more accurate horizontal projection motion law. This embodiment provides a physics horizontal projection experiment demonstration device, including a horizontally arranged operating platform 1 and a projectile mechanism installed on the operating platform 1, and the projectile mechanism includes a guide groove 2, a firing assembly, and a detection assembly 6. The guide groove 2 is horizontally fixed on the operating platform 1, and is used to horizontally guide the movement of the ball; the firing assembly includes a tension rod 3, an impact part 4 and an ejection part 5, the tension rod 3 is parallel to the guide groove 2 and the two are slidably connected, and the impact part 4 is placed in the guide groove 2 and fixed at one end of the tension rod 3; the ejection part 5 is arranged between the tension rod 3 and the operating platform 1, and is used to drive the tension rod 3 to drive the impact part 4 to impact the ball; the detection assembly 6 is arranged on the operating platform 1, and is used to detect the elastic force of the ejection part 5 in real time.

[0039] Specifically, when conducting a horizontal projection experiment, the operating platform 1 is adjusted to be placed horizontally, that is, the guide groove 2 is in a horizontal state, and then the ball is placed in the guide groove 2, and the ball is moved to a position that fits with the impact part 4 and remains stationary, and then the tension rod 3 is pulled to compress the spring. At this time, the tension rod 3 drives the impact part 4 and the ball to generate a launching distance, and the detection component 6 is used to observe the pulling force of the ejection part 5. After the elastic force of the ejection part 5 reaches a predetermined value, the tension rod 3 is released, and the impact part 4 hits the ball under the elastic force of the elastic member, generating an initial velocity for the ball, and then the ball rolls along the horizontal guide groove 2 and is thrown out from the end of the guide groove 2 to achieve a horizontal projection demonstration. Therefore, compared with the existing experimental method of the inclined guide rail and the horizontal desktop, the above method can effectively utilize the elastic force of the ejection part 5 to achieve precise control of the initial velocity of the ball during the experiment, and reduce more resistance effects, especially avoiding the influence of the connection position of the inclined guide rail and the horizontal desktop on the resistance of the ball, ensuring the stability of the ball velocity, and smaller experimental errors, thereby obtaining a more accurate horizontal projection motion law.

[0040] See also Figure 2 and Figure 4 As shown, further, in order to make the movement of the tension rod 3 more stable, ensure that the impact of the impact part 4 on the ball is more stable, and reduce the impact on the initial speed of the ball. Side grooves 7 are provided on the two opposite side walls of the guide groove 2. The side grooves 7 penetrate the side walls of the guide groove 2. The two side grooves 7 are arranged opposite to each other, and a slide bar 8 is slidably connected in each of the two side grooves 7. The opposite side of the two slide bars 8 is fixed to the tension rod 3 or the impact part 4, and the two slide bars 8 are connected to the ejection part 5. The sliding cooperation of the side grooves 7 and the slide bars 8 can ensure the stability of the movement of the tension rod 3, and then ensure the stability of the impact part 4.

[0041] See also Figures 2 to 5As shown, further, in order to provide a variable initial velocity for the ball and facilitate accurate control of the initial velocity of the ball. The ejection part 5 includes a positioning plate 51, two guide tubes and two compression springs 54. The positioning plate 51 is installed on the operating platform 1. A through hole 52 is provided on the positioning plate 51. The guide groove 2 and the tension rod 3 are both arranged through the through hole 52, and the side of the positioning plate 51 facing the impact part 4 is perpendicular to the tension rod 3; the two guide rods 53 correspond to the two slide rods 8 one by one, the guide rods 53 are parallel to the tension rod 3, one end of the guide rod 53 is fixed to the corresponding slide rod 8, and the other end is inserted through the positioning plate 51; the two compression springs 54 correspond to the two guide rods 53 one by one, the compression spring 54 is sleeved on the corresponding guide rod 53, and one end of the compression spring 54 abuts against the slide rod 8, and the other end is fixed to the positioning plate 51. When in use, firstly, the two guide rods 53 can be used to further limit the two sliding rods 8, and at this time, the movement stability of the tension rod 3 is more fully guaranteed. It is better that the two guide rods 53 are symmetrical about the tension rod 3, and then the setting of the two compression springs 54 can ensure the stability of the force on the tension rod 3, thereby ensuring that the force acting on the ball will not be offset, which is convenient for repeated experiments. When in use, the operator can quickly control the change of the elastic force of the compression spring 54 by pulling the tension rod 3 to change the compression distance of the compression spring 54, and then through cooperation with the detection component 6, the size of the elastic force can be accurately controlled, that is, the impact force of the ball against the impact part 4 is controlled, and the initial velocity of the ball is indirectly controlled.

[0042] See also Figure 7 As shown, further, in order to reduce the frictional resistance of the guide groove 2 to the movement of the ball and ensure the stability of the movement speed of the ball, a row of balls 9 are evenly spaced along the length direction on each inner side wall of the guide groove 2. Thus, the point contact formed between the balls 9 and the ball is used to change the original surface contact or line contact between the ball and the side wall of the guide groove 2, and the rolling effect of the ball can better reduce the frictional resistance of the guide groove 2 to the ball, improve the accuracy of the experiment, and obtain more accurate horizontal projection experimental laws.

[0043] See also Figures 4 to 6As shown, further, in order to better control the positioning and adjustment of the initial speed of the ball. The detection component 6 includes a first scale 61, a collection module 62 and a data processing system 63. The first scale 61 is arranged along the length direction of one of the guide rods 53, and the first scale 61 is embedded and fixed in the guide rod 53; the collection module 62 is arranged on the side of the positioning plate 51 away from the compression spring 54, and the collection module 62 uses a camera to collect the values ​​on the first scale 61 close to the positioning plate 51; the data processing system 63 is used to receive the data of the collection module 62 and calculate the elastic force of the compression spring 54. When in use, the acquisition module 62 is used to collect the vertical change of the first scale 61 on the guide rod, and the compression distance of the compression spring 54 can be detected, and then the collected data can be transmitted to the data processing system 63. The data processing system 63 can detect the size of the elastic force of the compression spring 54 using Hooke's law, so that the operator can control the size of the compression spring 54 according to the elastic force data displayed on the data processing module, thereby controlling the impact force of the impact part 4 on the ball, so as to accurately control the initial speed of the ball. Preferably, the calculation formula of Hooke's law is: F = -k·x, where x is the compression amount of the compression spring 54; k is a constant, called the stiffness coefficient of the object, which reflects the elastic properties of the material. In the International System of Units, the unit of F is Newton, the unit of x is meter, and the unit of k is Newton / meter.

[0044] See also Figure 5 As shown, further, due to the manual control of the operator, there are instability factors in the technique. In order to more accurately control the initial speed of the ball and improve the accuracy of the experimental results. A first telescopic rod 10 is also fixed on the side of the positioning plate 51 away from the compression spring 54. The first telescopic rod 10 is parallel to the guide groove 2. A second telescopic rod 11 is fixedly connected to the side of the first telescopic rod 10 away from the positioning plate 51. The second telescopic rod 11 is perpendicular to the first telescopic rod 10. The output end of the second telescopic rod 11 is set with a pull block 12 and the two are movably connected. The pull block 12 is fixed to one end of the tension rod 3 far from the impact part 4. When in use, the length of the second telescopic rod 11 is adjusted so that the output end of the second telescopic rod 11 is plugged with the pull block 12 at the end of the tension rod 3, and then the adjustment of the first telescopic rod 10 can accurately control the expansion and contraction of the compression spring 54. When the tension rod 3 is to be released, the second telescopic rod 11 can be controlled to contract and disengage from the pull block 12, so that the tension rod 3 can be released smoothly, so that the impact part 4 can hit the ball stably, and the accuracy of the experimental results is improved. Preferably, the first telescopic rod 10 and the second telescopic rod 11 can be electric push rods.

[0045] See also Figure 1 and Figure 5As shown, further, in order to improve the accuracy of the experiment and facilitate the reading and monitoring of the initial speed of the ball, a speed measuring component is also provided on the operating platform 1, and the speed measuring component includes a moving frame 19, a positioning part 20 and a laser speed meter 21. The moving frame 19 is slidably connected to one side of the operating platform 1, and the sliding direction of the moving frame 19 is parallel to the guide groove 2; the positioning part 20 is arranged between the moving frame 19 and the operating platform 1, and is used to adjust and fix the position of the moving part; the laser speed meter 21 is arranged on the top of the moving frame 19, and the detection end of the laser speed meter 21 faces the concave part of the guide groove 2, and is used to detect the speed of the ball. The laser speed meter 21 is electrically connected to the data processing system 63. The positioning part 20 includes a metal plate horizontally arranged on one side of the guide groove 2 and a magnetic suction block that can achieve adsorption with the metal plate. The adjustment of the adsorption position of the magnetic suction block on the metal plate can facilitate the installation and removal of the laser speed meter 21 and the position adjustment of the laser speed meter 21, thereby ensuring the accuracy of the speed measurement. When in use, the laser velocimeter 21 can effectively detect the initial velocity of the ball, which is convenient for recording and correcting experimental data and improving the accuracy of the experiment.

[0046] See also Figure 1 , Figure 3 and Figure 8As shown, further, since the operating platform 1 will be placed in different positions during the teaching process, it is very likely that the guide groove 2 cannot maintain a horizontal state, which will affect the speed of the ball. Therefore, in order to improve the accuracy of the experimental data. A leveling component 13 is also provided at the bottom of the operating platform 1, which is used to detect the horizontality of the guide groove 2 and adjust the guide groove 2 horizontally. The leveling component 13 includes a fixed seat 131, a movable seat 132, four telescopic parts 133 and a level 134. The fixed seat 131 is arranged at the bottom of the operating platform 1; the movable seat 132 is arranged between the fixed seat 131 and the operating platform 1, the movable seat 132 is parallel to the operating platform 1 and the two are detachably connected through a lifting assembly, and the movable seat 132 is connected to the fixed seat 131 through a ball joint; the four telescopic parts 133 are divided into two groups, two in each group, and the two telescopic columns of each group are symmetrically arranged between the fixed seat 131 and the movable seat 132 about the ball joint, the lower end of the telescopic part 133 is fixed to the fixed seat 131, and the upper end is abutted against the movable seat 132; preferably, the four telescopic columns are distributed in a cross. The level 134 is arranged on the movable seat 132, and is used to detect the horizontality of the movable seat 132. The level 134 is electrically connected to the data processing system 63. In order to facilitate the horizontal adjustment of the movable seat 132, the telescopic part 133 includes a stud 1331, a screw sleeve 1332 and an elastic block 1333. The stud 1331 is vertically fixed on the fixed seat 131; the screw sleeve 1332 is sleeved on the stud 1331, and its upper end contacts the movable seat 132; the elastic block 1333 is fixed on the upper end of the screw sleeve 1332, and the elastic block 1333 abuts against the movable seat 132. When in use, the level 134 can be used to monitor the horizontality of the movable seat 132 in real time, that is, indirectly realize the monitoring of the horizontality of the guide groove 2. After the device is installed, if the guide groove 2 does not reach a horizontal state, at this time, according to the detection result of the spirit level 134, the screw sleeve 1332 at the corresponding position is operated, and the inclination angle of the movable seat 132 at different positions is adjusted by lifting and lowering the screw sleeve 1332 on the stud 1331, and the deformation effect of the elastic block 1333 is used to ensure that no jamming occurs during the leveling process, thereby facilitating the leveling of the guide groove 2 and making the device more applicable.

[0047] See also Figure 5As shown, further, the device can also change the rolling distance of the ball in the guide groove 2. Specifically, a moving groove 14 is opened in the operating platform 1 in a direction parallel to the guide groove 2, and the positioning plate 51 is slidably connected to the moving groove 14. The positioning plate 51 and the guide platform are fixed by a first locking member 15, and a second scale ruler 16 is embedded and fixed in the moving groove 14. The rolling distance of the ball on the guide groove 2 can be changed by moving the positioning plate 51 on the operating platform 1, and the change of the positioning plate 51 can be recorded by the second scale ruler 16. Therefore, through the above adjustment method, the rolling distance of the ball on the guide groove 2 can be changed by using the same initial velocity, and the corresponding horizontal throwing law can be obtained.

[0048] See also Figure 2 and Figure 5 As shown, further, the lifting assembly in the present device includes a stabilizing plate 17 and a second locking member 18. Specifically, two stabilizing plates 17 are arranged between the movable seat 132 and the operating platform 1. The two stabilizing plates 17 are arranged on both sides of the operating platform 1 opposite to each other. The operating platform 1 is slidably connected with the two stabilizing plates 17, and the stabilizing plates 17 and the operating platform 1 are fixed by the second locking member 18. The height of the operating platform 1 can be adjusted by the arrangement of the two stabilizing plates 17 and the second locking member 18, so as to adjust the height of the ball horizontal throw, and to facilitate the summary of the ball horizontal throw law under height changes. Preferably, the first locking member 15 and the second locking member 18 are both detachably connected by bolt fixing.

[0049] See also Figure 1 and Figure 3 As shown, further, in order to improve the accuracy of the experiment, an accurate trajectory of the ball can be obtained. A trajectory acquisition component is provided at one end of the guide groove 2 away from the firing component, and the trajectory acquisition component includes a box 22 and a high-speed camera 23. The lower end of the box 22 is fixed to the movable seat 132, and an entrance hole 24 is provided in the vertical direction on the side of the box 22 facing the guide groove 2, and the guide groove 2 passes through the entrance hole 24 to enter the box 22; the box 22 is provided with a third scale on one side of the entrance hole 24 to facilitate the measurement of the height of the horizontal operating table. Furthermore, the high-speed camera 23 is arranged on a side wall of the box 22 adjacent to the guide groove 2, and the high-speed camera is electrically connected to the data processing system 63, and the data processing system 63 is used to receive and analyze the image data captured by the high-speed camera 23 to generate a trajectory diagram of the ball.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A physics horizontal projectile experiment demonstration device, comprising an operating platform (1) and a projectile mechanism installed on the operating platform (1), characterized in that: The ejection mechanism comprises: A guide groove (2) is horizontally fixed on the operating platform (1) and is used to horizontally guide the movement of the ball; A firing assembly comprises a tension rod (3), a striking part (4) and an ejection part (5), wherein the tension rod (3) is parallel to the guide groove (2) and the two are slidably connected, the striking part (4) is placed in the guide groove (2), and the striking part (4) is fixedly connected to one end of the tension rod (3), and the ejection part (5) is arranged between the tension rod (3) and the operating platform (1), and is used to drive the tension rod (3) to drive the striking part (4) to impact the ball; A detection component (6) is arranged on the operating platform (1) and is used to detect the elastic force of the ejection part (5) in real time.

2. A physics horizontal projection experiment demonstration device according to claim 1, characterized in that: Side grooves (7) are provided on opposite side walls of the guide groove (2), and the side grooves (7) penetrate the side walls of the guide groove (2). The two side grooves (7) are arranged opposite to each other, and a slide bar (8) is slidably connected in each of the two side grooves (7). The opposite sides of the two slide bars (8) are fixed to the tension rod (3) or the impact part (4), and the two slide bars (8) are connected to the ejection part (5).

3. A physics horizontal projection experiment demonstration device according to claim 2, characterized in that: The ejection part (5) comprises: A positioning plate (51) is mounted on the operating platform (1), a through hole (52) is provided on the positioning plate (51), the guide groove (2) and the tension rod (3) are both arranged through the through hole (52), and the side of the positioning plate (51) facing the impact portion (4) is perpendicular to the tension rod (3); Two guide rods (53) corresponding to the two slide rods (8) one by one, the guide rods (53) are parallel to the tension rods (3), one end of the guide rod (53) is fixed to the corresponding slide rod (8), and the other end is inserted through the positioning plate (51); Two compression springs (54) correspond to the two guide rods (53) one by one. The compression springs (54) are sleeved on the corresponding guide rods (53), and one end of the compression spring (54) abuts against the slide rod (8), and the other end is fixed to the positioning plate (51).

4. A physics horizontal projection experiment demonstration device according to claim 1, characterized in that: A row of balls (9) is arranged at equal intervals along the length direction on each inner side wall of the guide groove (2).

5. A physics horizontal projection experiment demonstration device according to claim 3, characterized in that: The detection component (6) comprises: A first scale ruler (61) is arranged along the length direction of one of the guide rods (53), and the first scale ruler (61) is embedded and fixed in the guide rod (53); A collection module (62), arranged on a side of the positioning plate (51) away from the compression spring (54), and used for collecting values ​​on the first scale (61) close to the positioning plate (51); The data processing system (63) is used to receive data from the acquisition module (62) and calculate the elastic force of the compression spring (54).

6. A physics horizontal projection experiment demonstration device according to claim 3, characterized in that: A first telescopic rod (10) is also fixed to the side of the positioning plate (51) away from the compression spring (54), the first telescopic rod (10) is parallel to the guide groove (2), and a second telescopic rod (11) is fixedly connected to the side of the first telescopic rod (10) away from the positioning plate (51), the second telescopic rod (11) is perpendicular to the first telescopic rod (10), a pulling block (12) is mounted on the output end of the second telescopic rod (11) and the two are movably connected, and the pulling block (12) is fixed to one end of the tension rod (3) far from the impact portion (4).

7. A physics horizontal projection experiment demonstration device according to claim 3, characterized in that: The operating platform (1) is provided with a movable groove (14) in a direction parallel to the guide groove (2); the positioning plate (51) is slidably connected to the movable groove (14); the positioning plate (51) and the guide platform are fixed by a first locking member (15); and a second scale ruler (16) is embedded and fixed in the movable groove (14).

8. A physics horizontal projection experiment demonstration device according to claim 1, characterized in that: Two stabilizing plates (17) are arranged between the movable seat (132) and the operating platform (1). The two stabilizing plates (17) are arranged opposite to each other on both sides of the operating platform (1). The operating platform (1) is slidably connected to the two stabilizing plates (17), and the stabilizing plates (17) and the operating platform (1) are fixed by a second locking member (18).

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