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Q.

A person just holds a block weighing 2kg between his hands & just keeps it from falling down by pressing it with his hands. If the force exerted by each hand horizontally is 50N, the coefficient of friction between the hand & the block is g=10ms−2

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a

0.2

b

0.4

c

0.1

d

0.5

answer is A.

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Detailed Solution

2μN=mg;μ=mg2Nμ=2×102×50=210=0.2
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