A clerk can lift containers a vertical distance of 1 meter or can roll them up a 3 meter-long ramp to the same elevation. With the ramp, the applied force required is:

a. The same.
b. Half as much.
c. Twice as much.
d. Four times as much.
e. None of the above

(e) none of the above

Explanation:

work done is the product of applied force and vertical distance.

work done = Fd

F₁d₁ = F₂d₂

given;

vertical distance a clerk can lift containers , d₁ = 1 m

vertical distance rolled along a ramp, d₂ = 3 m

substitute these values in the above equation;

Therefore, the applied force is one-third the original value.

The correct option is (e) none of the above.

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