Verification device for Newton second law

Abstract

The invention relates to a verification device for the Newton second law. The verification device is characterized in that: a photoelectric door A (5) is taken as a switch for timing start of a digital millisecond meter A (1) and a digital millisecond meter B (2); the photoelectric door A (5), a photoelectric door B (6) and a photoelectric door C (7) are fixed on a steel plate (3) in sequence, and are taken as timing switches of the digital millisecond meter A (1) and the digital millisecond meter B (2) for recording the acceleration motion time of a trolley (4) on the steel plate (3) and computing the acceleration of the trolley (4); the position of a base plate (8) is changed, and the mass of the trolley (4) is kept constant, so that direct proportion between the acceleration and resultant force can be verified when the mass is constant; and meanwhile, the position of the base plate (8) and the mass of the trolley (4) are changed, and the resultant force is kept constant, so that inverse proportion between the acceleration and the mass can be verified when the resultant force is constant. The verification device can be applied to a verification experiment of the Newton second law in physics.

Description

Technical field [0001] The invention relates to a verification device for Newton's second law. Background technique [0002] In the mechanics experiment of middle school and university, it is usually used to verify Newton's second law by using a heavy object to pull a trolley to accelerate on a plane or an air cushion guide rail. By changing the mass of the slider or the mass of the heavy object, the relationship between the acceleration of the object, its mass and the resulting force can be quantitatively studied. However, in the above experiment process, the systematic error caused by the gravity of the heavy object and the moment of inertia of the pulley is difficult to eliminate, and the accidental error in the experiment process is relatively large. Contents of the invention [0003] The purpose of the present invention is to provide a kind of verification device of Newton's second law, this device has no system error caused by the gravity of the weight and the inert...

AI Technical Summary

Problems solved by technology

However, in the above experiment process, the system error caused by the gravity of the heavy object and the moment of inertia of the pulley is difficult to eliminate, and the accidental error in the experiment process is relatively large.

Images