The relationship between mechanical power and work and energy conversion Since work is a measure of energy conversion, the speed of doing work is also the speed of energy conversion, Why is it true that "the greater the power of a machine, the faster the machine works", Is it wrong to say that the greater the power of the machine, the faster the energy conversion when the machine is working?

The relationship between mechanical power and work and energy conversion Since work is a measure of energy conversion, the speed of doing work is also the speed of energy conversion, Why is it true that "the greater the power of a machine, the faster the machine works", Is it wrong to say that the greater the power of the machine, the faster the energy conversion when the machine is working?

First of all, we should make clear the concept of power: the amount of work done per unit time. Therefore, if the power is large, the faster the work will be done naturally in the same working time. The speed of energy conversion is not a matter of mechanical power, but can only be regarded as a matter of efficiency of mechanical work

High school physics conveyor belt project, internal energy and friction work and drive the conveyor belt rotation motor work difference

Generally, the work done by the conveyor belt can not be simply done by using the basic formula w = FS. Generally, the work done here should be considered from the aspect of energy, which is the simplest;
For example, it takes T seconds for the motor (power P) to drive the conveyor belt to transfer the object (mass m) from one end of the conveyor belt to the other end;
1. Motor work, w = Pt
2. Work done by friction, w = energy generated by friction just put on + increase of potential energy + increase of kinetic energy
3. The heat of internal energy, generally speaking, occurs when the object is just put on the conveyor belt and the speed of the object reaches the same speed as that of the conveyor belt, in the s distance of sliding
Internal energy Q = w (work done by friction) - potential energy increment - kinetic energy increment