Wenzhou elevator recruitment

There is relative stillness between passengers and elevators. A must be wrong.

The pressure has nothing to do with the stress area, and item B is also wrong.

Item d, two forces in the same direction, is definitely not a pair of balancing forces.

This seems to be the reliable point of C. According to the law of conservation of capacity, the potential energy increases and the kinetic energy decreases. The reason why the elevator can maintain a constant speed is because Xiaohong still has a force.

Well, after four years in college, I forgot all this knowledge = =