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JEE Advanced 2020 Full Test 2 Paper 1

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Question : 6

Total: 54

The coefficient of friction between the block and plank is µ and its value is such that block becomes stationary with respect to plank before it reaches the other end. Then

the work done by friction on the block is negative
the work done by friction on the plank is positive
the net work done by friction is negative
net work done by the friction is zero

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