Acar is being lifted by a crane so that it moves upwards at a constant speed.

which force is doing negative work on the car as its being lifted?

a) the force of the rope acting on the car
b) there is no work being done because the kinetic energy of the car is constant
c) the force of gravity on the car due to the earth
d) the force of the car acting on the rope

part 2: which force is doing positive work on the car as it's being lifted?
a) the force of the earth acting on the car
b) there is no work being done because the kinetic energy of the car is constant
c) the force of the rope acting on the car
d) the force of the car acting on the rope