A horizontal force of $10 \,N$ is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is $0.2$. the weight of the block is ........ $N$
AIEEE 2003, Easy
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(a) $F = \frac{W}{\mu }$
$\therefore W = \mu F = 0.2 \times 10 = 2N$
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