1) Suppose a 1400-kg elevator car is lifted a distance 36 m by its cable at a constant speed, assuming the frictional force on the elevator has a constant value of 95 N.
(a) Calculate the work done on the elevator by its cable, in joules.
(b) Calculate the work done by the gravitational force on the elevator, in joules, during this process.
(c) Calculate the total work done on the elevator, in joules.