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Question: Answered & Verified by Expert
Work done by static friction on an object 
PhysicsWork Power EnergyNEET
Options:
  • A may be positive
  • B must be negative
  • C must be zero
  • D none of these
Solution:
2940 Upvotes Verified Answer
The correct answer is: may be positive


Consider the blocks shown in the figure to be moving together due to static friction between them.

The free body diagrams of both the blocks are shown below.



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

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