Shandong Huifeng Mining Machinery Co, Ltd

1. The work done by the motor is equal to the work done to overcome the friction, and part of this work is converted into internal energy, and part of it is converted into the mechanical energy of small blocks.

2. It is the work done by the object. The object should be the displacement of the object. It has nothing to do with the conveyor belt
imagine that they are going in the opposite direction. According to your 2 ideas, how much should it be? Right? Find the right person.

3. There is no relative displacement between the conveyor belt and the small block, so there is no heat generation

4. It's not friction that does work, it's friction that acts as an intermediary medium, that is, the mechanical energy (mechanical energy) converted from electric energy of the motor is transferred (transferred) to the object through the transfer station of friction. For example, the greater the mass of the object on the conveyor belt, the more the speed of the conveyor belt will be sacrificed (that is, it will drop), that is, the sacrificed energy will be transferred into the object to do work, It's friction that transfers