Perpendicular Forces: Solution

Brief about Answers

This page gives an opportunities to see answers and to assess learners if they grasped the right knowledge on perpendicular forces:
This helps to get correct any misconceptions and understand perpendicular forces.

Question:

Does the normal force of the pushing upward on the sled do any work (see below:)?

No, the normal force does no work.
Yes, the normal force does work.
Only part of the normal force does work.
You can't tell from the drawing.

Answer:

Since the normal force is perpendicular to the distance moved, it does no work on the sled.

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