Question

An elevator is hoisted by the cables at constant speed. the total work done by the elevator is
1. zero
2. negative
3. positive
4. positive or negative depending on direction of motion

Answer 1

Answer:

Explanation: total work done on the elevator will be zero according to Work-Energy relationship. Because for constant speed their is constant velocity. The initial and final velocity will be constant and this makes change in Kinetic energy equals to zero as it has negative velocity difference between initial and final point.