Momentum Theorem Experimenter

Abstract

The invention provides an experimental device for the theorem of momentum. The experimental device comprises an ejection device, an ejection ball, a transmitting tube, a photoelectric door and a force sensor. The ejection device and the force sensor are respectively arranged at the two ends of the transmitting tube. The detection light path of the photoelectric door penetrates across the transmitting tube arranged between the ejection device and the force sensor. The ejection ball is arranged in the transmitting tube and can roll back and forth between the ejection device and the force sensor. The photoelectric door and the force sensor are respectively connected with a data acquisition device in a communication way. In the experiment, the ball is ejected out through the ejection device, and the ball collides a spring arranged at the front of the micro force sensor and then is bounced back. The photoelectric door can measure the speed value before and after collision of the ball in the process, and the momentum before and after collision of the ball and the variation of the momentum can be solved through combination of the mass m of the ball. The force sensor can measure the size of stress in the collision process of the ball and the change process of the force so as to obtain the size of momentum applying to the ball.

Description

technical field [0001] The invention relates to an experiment device, specifically a momentum theorem experiment device, belonging to the technical field of teaching experiment equipment. Background technique [0002] Momentum experiment is an important content in high school physics, and air cushion guide rails are often used for momentum experiments. The air cushion guide rail is a modern mechanical experiment instrument. It utilizes a small air source to deliver compressed air into the inner cavity of the rail. The air is ejected from the small holes on the surface of the guide rail, forming a thin air cushion layer between the surface of the guide rail and the inner surface of the slider. The glider floats on the air cushion layer and is out of contact with the rail surface, so it can make approximately no resistance linear motion on the rail surface, which greatly reduces the error caused by friction in the previous mechanical experiments, making the experimental resu...

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Problems solved by technology

The glider floats on the air cushion layer and is out of contact with the rail surface, so it can make approximately no resistance linear motion on the rail surface, which greatly reduces the error caused by friction in the previous mechanical experiments, making the experimental results close to Theoretical value, but this kind of equipment generally requires a large volume and length, and there will be noise from the air compressor when the air cushion is formed, which will affect the demonstration and observation of the experiment

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