Question #2a88b

1 Answer
Mark C.
Feb 4, 2018

Both of these negate the equation #W = F xx s costheta# because the force is perpendicular to the displacement.

Explanation:

Example 1: carrying a heavy box of cool drinks along the shoreline. There is no work done against gravity, but plenty done against friction (where the angle is zero, so #cos theta = cos 0^@ = 1#)

Example 2: a satellite in a circular orbit. Again force (gravity) providing the centripetal acceleration is perpendicular to the direction of travel.

Related questions
Impact of this question
744 views around the world
You can reuse this answer
Creative Commons License