A clerk can lift containers a vertical distance of 1 meter or can roll them up a 2 meter-long ramp to the same elevation.With the ramp,the applied force required is about
A)half as much.
B)twice as much.
C)the same.
D)four times as much.

Question

Quizplus · Accepted Answer

According to the concept of work done, the amount of force required to lift an object vertically is equal to the amount of force required to roll it up an inclined plane. However, the applied force required to roll the object up the ramp is lesser than the force required to lift it vertically. 
This is because the inclined plane reduces the effective weight of the object, making it easier to move. So, the clerk would require about half the amount of force to roll the container up the ramp as compared to lifting it vertically. Hence, the correct choice is A) half as much.

A Clerk Can Lift Containers a Vertical Distance of 1