Accurate simple pendulum experimental device

Abstract

The invention provides an accurate simple pendulum experimental device. The device includes a base, a lead screw, a lead screw vertical plate, a cycloid and a pendulum. The lead screw vertical plate is fixed to the base. The accurate simple pendulum experimental device is characterized in that a winding base is fixed to an upper fixed table, and the pendulum is fixed to the lower end of the cycloid; and a slide table is arranged on the lead screw and is fixedly provided with a photoelectric door for detecting the moment when the pendulum passes the lowest point, a laser hole aligning with thelowest point position of the pendulum is arranged in the photoelectric door, and a vertical graduated scale for marking the length of the cycloid is fixed to the lead screw vertical plate. The accurate simple pendulum experimental device achieves the release of non-initial velocity at any transverse position and any height of the pendulum and satisfies the law of energy conservation in a solving process; because the length and swing distance of the cycloid can be measured by the graduated scale, a swing angle can be obtained by inversely solving a trig function, and the measurement error of the swing angle is greatly reduced. The experimental device is lower in cost and very suitable for a large number of students to use in simple pendulum physics experiments, and has a broad economic development prospect.

Description

technical field [0001] The present invention relates to a single pendulum experimental device, more specifically, to an accurate single pendulum experimental device which can accurately determine the center of rotation of a cycloid, the pendulum angle, the pendulum length and release the pendulum ball without initial velocity. Background technique [0002] The simple pendulum test is a simple but very important experiment in the teaching of basic physics in colleges and middle schools, namely: use a thin wire with negligible weight to hang a weight with a mass of m to make it swing left and right, when the pendulum angle is At 0 degrees, the resultant external force on the hammer is equal to the gravity of the ball itself. A rope and a small ball can form a simple pendulum experiment and can roughly estimate the local acceleration of gravity. The operation steps of the existing single pendulum experimental device in university physics are basically as follows: first, accord...

AI Technical Summary

Problems solved by technology

However, this kind of experiment is slightly insufficient in data accuracy and operation content, which is not conducive to students' learning and understanding of the motion process and principle of the simple pendulum: for the swing center of the cycloid, the existing swing tester cannot accurately center, The measurement of the pendulum angle and cycloid has a large deviation. When the pendulum is released, the initial velocity at the time of release is undoubtedly increased due to the method of manually pulling up a certain pendulum angle, which does not satisfy the law of energy conservation when solving the acceleration solution.

Therefore, the existing test instruments have large errors in the key swing measurement parameters, which greatly affects the solution accuracy

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