Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(A) 100Nm. (B) 300Nm.
(C) -100Nm. (D) -300Nm.
(E) It depends on the length of the stairs.

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Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(A) 100Nm. --- No.

Multiply by distance in direction of the force.
Try again.
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Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(B) 300Nm. --- Yes. (100N)(3m) = 300Nm.

Multiply force times distance in direction of force.

Check the other answers.
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Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(C) -100Nm. --- No.

Multiply the force (100N) by the distance in the direction of the force (3m).

Try again.
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Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(D) -300Nm. --- No.

The magnitude of the force is always positive
and here the distance in the direction of the force (upwards) is also positive.
Try again.
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Suppose that you climb a flight of stairs while carrying a pail which weighs 100N. If the top of the stairs is 3 meters higher than the bottom, how much work has been done by the force which you exert on the pail?

(E) It depends on the length of the stairs.

No. The force is upward, so it depends only on the distance
traveled upward --- 3m.
Try again.
Questions --- What this question is about
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