Gravity and friction relationship test device

Abstract

The invention discloses a gravity and friction relationship test device. The device comprises a support device installed on a stand column, a gravity device placed on a light pull sheet and a variable force device assembled on a pedestal. The support device comprises a support sheet, a light pull sheet, a bayonet and a fastening bolt. The gravity device comprises a container, a container cover and a magnet. The variable force device comprises an electromagnet, a slide rheostat, a power supply, a switch, a slip sheet and a wire. Left block needle and right block needle are symmetrically arranged on the support sheet of the support device. A container cover button, a container cover thread and a container cover hole are formed on the container cover. According to the invention, the gravity and friction relationship test device has the advantages that test purpose is achieved, the structure is simple, the effect is visual, the stability is good, the repeatability is strong, the conclusion is clear and the physical knowledge learning of students is facilitated.

Description

technical field [0001] The invention relates to a physical experiment technique, in particular to an experiment technique for the relationship between gravity and friction. Background technique [0002] When discussing gravity and friction in middle school physics, it is stated that the force received by an object due to the attraction of the earth is called gravity, and the force that hinders the relative motion (or relative motion trend) of an object is called friction. These are two important basic concepts. There is no necessary quantitative relationship between these two physical quantities. The force related to friction is pressure. It is difficult for middle school students to distinguish the relationship between gravity and friction when they learn about the relationship between gravity and friction. It is easy to mistakenly believe that there is a certain relationship between gravity and friction. Quantitative relationship, resulting in a deviation in the understand...

AI Technical Summary

Problems solved by technology

[0002] When discussing gravity and friction in middle school physics, it is stated that the force received by an object due to the attraction of the earth is called gravity, and the force that hinders the relative motion (or relative motion trend) of an object is called friction. These are two important basic concepts. There is no necessary quantitative relationship between these two physical quantities. The force related to friction is pressure. It is difficult for middle school students to distinguish the relationship between gravity and friction when they learn about the relationship between gravity and friction. It is easy to mistakenly believe that there is a certain relationship between gravity and friction. Quantitative relationship, resulting in deviations in the understanding of middle school mechanics knowledge

[0003] In the existing experimental technology involving the relationship between friction and gravity, such as "a physics experiment research tester" with application number 201420425405.5, it is mentioned that "the main purpose of this utility model is to provide a gravity that can test the object, which can Adjust the inclination of the friction coefficient test plate, so that the friction coefficient can be calculated. Since the friction coefficient μ of different materials on different surfaces is different, according to the calculation formula of friction force F=μN, it is known that the friction coefficient μ=F / N , where N is pressure, and the technology of the utility model confuses the relationship between gravity and pressure. At the same time, in the structure of the utility model, the water tank is placed in the experimental equipment of the classroom, which is difficult to have specific operability

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