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As shown in figure, if we apply a horizo...

As shown in figure, if we apply a horizontal force `F` on the block, find the maximum force `F` (in `N`) that can be applied so that block does not slide up. `( "Given" theta=45^(@),g=10m//sec^(2), m=1/5kg,mu=1/2)`

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Verified by Experts

The correct Answer is:
6
`FcosthetagemuN+mgsintheta`
But `N=Fsintheta+mgcostheta`
`Fcosthetagemu(Fsintheta+mgcostheta)+mgsintheta`
`FgemuF+mumg+mg`
`F/2ge3/2mg`
`Fge3mg,Fge3xx1/5xx10`
`Fge6N`
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