Uniform variable rectilinear motion demonstration instrument

Abstract

The invention relates to an indispensable and important demonstrator used in high school physical mechanics experiment teaching. According to the invention, a thin cylinder is sleeved into a thick cylinder and then inserted into a middle square aluminum box, upper and lower plastic rotating sleeves of the middle square aluminum box are connected and rotated to be reinforced, the bottom end of thethick cylinder is rotated into a central screw hole on a pedestal and tightened by rotation, a cylinder is connected with a thin line and then placed in a lantern ring, a motor shaft rod is connectedand reinforced with a thin soft pen, and finally an upper square aluminum box is installed. A battery box, a circuit board, a speed regulator, a resistor, a switch and a motor are installed in the middle square aluminum box. When the uniform variable rectilinear motion demonstration instrument is in use, the thin soft pen is coated with red ink, then the cylinder is lifted by the thin line, powerswitches K1, K2 are closed to enable the motor to rotate at a uniform speed, the thin line is loosened when the thin soft pen also rotates at a uniform speed along with the motor so as to enable the cylinder to fall in free, and the thin soft pen draws a plurality of spiral marks on the surface of the cylinder. When the uniform variable rectilinear motion demonstration instrument is used in teaching, not only is the usage convenient, the visibility is great, but also the uniform variable rectilinear motion law can be quantitatively verified.

Description

1. Technical field [0001] The invention is a high school physical mechanics experiment teaching demonstrator, which quantitatively verifies the "law of uniformly variable linear motion". 2. Background technology [0002] At present, all school laboratories use AC power supply (or student power supply) to dot timers, hammers, paper tapes and other equipment to verify the "law of uniform linear motion", but the series of dots made by the dot timer are blurred Clear, difficult to measure, inconvenient to calculate, bring great difficulties to students' experiments, and cause large system errors. It is easy to damage the floor tiles. 3. Contents of the invention [0003] The purpose of the present invention is to provide teachers and students with an energy-saving and emission-reducing uniform-speed linear motion demonstrator, which can scientifically and quantitatively verify the "law of uniform-variable linear motion", which students like and accept easily. [0004] The pu...

AI Technical Summary

Problems solved by technology

[0002] At present, all school laboratories use AC power supply (or student power supply) to dot timers, hammers, paper tapes and other equipment to verify the "law of uniform linear motion", but the series of dots made by the dot timer are blurred Clear, difficult to measure, inconvenient to calculate, bring great difficulties to students' experiments, and cause large system errors. Easily damage floor tiles

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