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Work down by static friction on an objec...

Work down by static friction on an object `:`

A

may be positive

B

must be negative

C

must be zero

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A

Consider the blocks shown in the figure to be moving together due to friction between them. The free body diagrams of both the blocks is shown below.

Work done by static friction on `A` is positive and on `B` is negative.
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