A boy of mass M is applying a horizontal...

A boy of mass M is applying a horizontal force to slide a box of mass M on a rough horizontal surface. The floor is `mu` and the between the box and the floor is `mu'`. In which of the following cases it is certainly not possible to slide the box?

`mu lt mu' , M lt M'`

`mu gt mu' , M lt M'`

`mu lt mu' , M gt M'`

`mu gt mu' , M gt M'`

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Verified by Experts

The correct Answer is:

The box will move if
`mu Mg gt mu'M'g`
`mu M gt mu' M'`
If `mu lt mu', M lt M'` , the block will not move

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