Demonstration device for momentum conservation experiment in physics teaching
A technology of momentum conservation and demonstration device, which is applied in the direction of educational appliances, teaching models, instruments, etc., can solve the problems of affecting the effect, affecting the experimental effect, and the tilting of the car, so as to achieve reasonable structural design, simple and convenient experimental operation, and improve teaching effect Effect
Inactive Publication Date: 2017-10-24
ZHENGZHOU DANDIAN TECH SOFTWARE
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Problems solved by technology
Although this experimental method is simple and intuitive, the length of the thin line in the middle will determine the compression length of the spring, which directly affects the effect of the experiment. Moreover, when the middle thin line is connected, the trolley may tilt and affect the experimental effect. The contact position between the spring and the trolleys on both sides , may also cause changes in the force direction of the trolley and affect the experimental results
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[0011] Attached below figure 1 ~ attached image 3 The present invention is described in detail below.
[0012] like Figure 1~Figure 3 As shown, the present invention comprises base plate 1, guide rail 4, spring block 2, slide block 3, roller 5, and described base plate 1 lower end is provided with 4 rollers 5, and base plate 1 upper end side is provided with scale line 6, and base plate 1 is provided with There are 2 guide rails 4, and the guide rails 4 are provided with bullet blocks 2 and slide blocks 3. This device can not only visually demonstrate that the bullet block 2 and the slider 3 move left and right under the interaction force, they both gain momentum, but the vector sum of the momentum is zero, to verify the law of conservation of momentum, or through the movement of the bottom plate 1 State to show that when the external force on the system is zero, the total momentum of the system remains unchanged. During the movement of bullet 2 and slider 3, the total mo...
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The invention relates to the field of physics teaching aids and especially relates to a demonstration device for momentum conservation experiment in physics teaching, the device comprises a base plate, guide rails, an elastic block, a sliding block and rollers, four rollers are arranged on the lower end of the base plate, a scale line is arranged on one side of the upper end of the base plate, two guide rails are arranged on the base plate, and the elastic block and the sliding block are arranged on each guide rail; and the weights and the bottom shapes of the elastic block and the sliding block are the same. According to the invention, the structure is reasonable, the experimental operation is simple and convenient, a phenomenon that: the system is under endogenetic process, when a part of momentum in one direction changes, the remain part of momentum along the opposite direction has the same change in the same size, system internal force only can change motion states of objects in the system and can not change the motion states of whole system, whole momentum of the system remains unchanged, and teaching effect of momentum conservation experiment demonstration is greatly improved.
Description
technical field [0001] The invention relates to the technical field of physics teaching appliances, in particular to a demonstration device suitable for momentum conservation experiments in physics teaching. Background technique [0002] If there is no external force on a system, or the vector sum of the external force is zero, the total momentum of the system remains unchanged, which is the law of conservation of momentum. The law of conservation of momentum is one of the most important and common laws of conservation in nature. It is applicable to both macroscopic objects and microscopic particles; it is applicable to both low-speed moving objects and high-speed moving objects. It is an experimental law. Therefore, verifying the conservation of momentum is an important experiment for students in the teaching of high school physics experiments. The existing momentum conservation experiments are usually to connect two stationary cars with a thin wire, and there is a compres...
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IPC IPC(8): G09B23/10
CPCG09B23/10
Inventor 翁自勇
Owner ZHENGZHOU DANDIAN TECH SOFTWARE