Road gate courseware

Lever principle

Physical science

intro

Lever principle亦称“杠杆平衡条件”。要使杠杆平衡，作用在杠杆上的两个力（动力点、支点和阻力点）的大小跟它们的力臂成反比。动力×动力臂=阻力×阻力臂，

Lever principle

When using the lever, in order to save effort, the power arm should be longer than the resistance arm lever; If you want to save distance, you should use a lever whose power arm is shorter than the resistance arm. So the use of leverage can save effort, but also can save distance. However, if you want to save effort, you must have more

Travel distance; If you want to travel less distance, you have to work harder. It is impossible to achieve with less effort and less travel distance

The composition and working principle of pneumatic transmission

Pneumatic transmission is a technology for energy transmission and signal transmission with compressed air as the working medium. The working principle of pneumatic transmission is to use the air compressor to convert the mechanical energy output by the motor or other prime mover into the pressure energy of the air, and then under the action of the control element, the pressure energy is converted into the mechanical energy in the form of linear motion or rotary motion by the executive element, so as to complete various actions and do external work. It can be seen that the pneumatic transmission system is similar to the hydraulic transmission system.

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