A horizontal force of 10N is necessary t...

A horizontal force of 10N is necessary to just hold a block stationary against as well. The coefficient of friction between the block and the wall is 0.2. The weight of the block is

20N

50N

100N

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The correct Answer is:

The block will be stationary so long as mg=f=force of friction`=muR`
`=0.2xx10=2N`

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