A boy of mass M is applying a horizontal force to slide a box of mass M_(1) on rough horizontal surface. The coefficient of friction between the shoe of the boy and the floor is mu and that between the box and the floor is ‘mu_(1)’ In which of the following cases is it certainly not possible to slide the box ?

A boy of mass M is applying a horizontal force to slide a box of mass

1.	A boy of mass M is applying a horizontal force to slide a box of mass M_(1) on rough horizontal surface. The coefficient of friction between the shoe of the boy and the floor is mu and that between the box and the floor is ‘mu_(1)’ In which of the following cases is it certainly not possible to slide the box ?
Answer» `multmu_(1), M ltM_(1)` `mugt mu_(3), M gt M_(1)` `MU lt mu_(1), M gt M_(1)` `mu gt mu_(1), M lt M_(1)` ANSWER :A