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If the lower block is held fixed & force...

If the lower block is held fixed `&` force is applied to `P`, minimum force required to slide `P` on `Q` is `12N`. Now if `Q` is free to move on frictionless surface and force is applied to `Q` then the minimum force `F` required to slide `P` on `Q` is `..........................`

Text Solution

Verified by Experts

The correct Answer is:
`27N`
Case `(i):`

`f_(max)=F_(min)=12N`
Case `(ii):`
`a=(F)/(9)`
`f_(max)=12`
`rArr 4a=12`
`rArr 4((F)/(9))=12F=27N`
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