Suppose a 1200-kg elevator car is lifted a distance 45 m by its
cable at a constant speed, assuming the frictional force on the
elevator has a constant value of 1750 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.