An elevator of weight W is initially at rest on the first floor of a building. It moves upward and passes the second floor with speed v0. It continues upwards and finally stops at the fourth floor. The distance between adjacent floors is H.
Is the change in kinetic energy for the entire trip greater than, less than, or equal to zero? explain.
Based on your answer above, is the net work done on the elevator during the entire trip greater than, less than, or equal to zero? explain.