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Q. 7

Expert-verified
Found in: Page 227

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

A particle moves in a vertical plane along the closed path seen in FIGURE Q9.7, starting at Aand eventually returning to its starting point. Is the work done by gravity positive, negative, orzero? Explain.

The work done is Zero.

See the step by step solution

Step 1 : Given Information

A particle moves in a vertical plane along the closed path seen in FIGURE Q9.7, starting at A
and eventually returning to its starting point.

Step 2 : Explanation

The work done is given by the multiplication of force and displacement in the direction of force.

$W=Fxd.$

In this case displacement $d=0$ as it returns to the same point.

So the work done will be

$W=Fx0=0$