A block of mass $1 k g$ is held against rough vertical wall be applying horizontal force of $40 N$ . If the coefficient of friction between block and wall is $0.5$ , then magnitude of friction force acting on the block, is

20 N

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18 N

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10 N

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15 N

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Solution

The correct option is C $10 N$
$f_{r} = m g$

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A block of mass 1 kg is held against rough vertical wall be applying horizontal force of 40 N. If the coefficient of friction between block and wall is 0.5, then magnitude of friction force acting on the block, is

The correct option is C 10 Nfr=mg

A block of mass $1 k g$ is held against rough vertical wall be applying horizontal force of $40 N$ . If the coefficient of friction between block and wall is $0.5$ , then magnitude of friction force acting on the block, is

The correct option is C $10 N$
$f_{r} = m g$