Visual free falling body motion experiment device and experiment method

Abstract

The invention discloses a visual free fall motion experiment device and method, and the device comprises a cross beam (6) disposed on a right column (11) and a left column (5), a rod A (8) and a rod B (9) are inserted into a transverse long hole (10) in the middle of the cross beam (6), a lower rod (15) is disposed in a vertical long hole (16) in the middle of the right column (11), a metal plate (4) is suspended on the rod A (8) through a line A (13), and the other end of the line A (13) bypasses the rod A (8), bypasses the lower rod (15) and then is clamped by a line clamp (17). A metal ball (2) is hung on a rod B, a wire C (3) is connected to the rightmost spherical surface of the metal ball (2), the other end of the wire C (3) is pulled to bypass a lower rod (15) and then is clamped by a wire clamp (17), a wire A (13) and the wire C (3) are cut off at the lower rod (15) by a pair of scissors, and the value of acceleration a can be calculated by recording the falling distance of a metal plate (4) and the swinging time of the metal ball (2) for a quarter period.

Description

technical field [0001] The invention relates to a physical experiment device, in particular to an intuitive free fall motion experiment device and an experiment method. Background technique [0002] In middle school physics teaching, free fall motion is an important learning content. According to Galileo's research results, free fall motion is a uniformly accelerated linear motion with zero initial velocity. And directly point out that the acceleration of all objects in free fall is the same. This acceleration is called the acceleration of free fall, also called the acceleration of gravity, which is usually expressed by g. In the usual calculation, the value of g can be taken as 9.8m / s 2 . However, directly telling students the magnitude of the gravitational acceleration in teaching will make students unconvinced and unable to have a deep understanding of the concept of gravitational acceleration. Middle school physics needs to train students' visual thinking ability, and t...

AI Technical Summary

Problems solved by technology

[0005] Students need to have the most direct method to verify the above formula and measure the value of acceleration a, but some of the existing gravitational acceleration measurement methods require indirect measurement and understanding, and some require complex modern measuring instruments. The device is very complicated and not intuitive The method, directly through the relationship between the distance of the free fall of the object and the time it takes, verifies that the acceleration a of the free fall is the acceleration of gravity g, and g=9.8m / s 2

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