A donkey pulls a crate up a rough inclined plane at constant speed. which of the following statements concerning this situation is false? a) The gravitational potential energy of the crate is increasing.
b) The net work done by all the forces acting on the crate is zero joules.
c) The work done on the crate by the normal force of the plane is zero joules.
d) The donkey does "positive" work in pulling the crate up the incline.
e) The work done on the object by gravity is zero joules.

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.