Answer   how does using a ramp make work easier when loading a piano onto a truck three feet above the ground? a. it allows a larger force to be applied over a shorter distance. b. it allows a larger force to be applied over a longer distance. c. it allows a smaller force to be applied over a shorter distance. d. it allows a smaller force to be applied over a longer distance.

Here when we use ramp to move an object to some height the applied force to pull it upwards is less

As we know that when we pull an object directly upwards then the applied force must be equal to the weight of the object

so here applied force is

F = mg

If we pull the object on the inclined plane then the applied force is parallel to the inclined plane

This force is is given by

so here we will have if we compare the two force we can say that force on the object to move it upwards will be less if we pull it along the inclined plane.

But here since we have to pull it over the inclined plane which would be longer in length then we pull it directly upwards

So correct answer would be

D. It allows a smaller force to be applied over a longer distance.