A boy of mass M is applying a horizontal force to slide a box of mass M ′ on a rough horizontal surface. The coefficient of friction between the shoes of the boy and the floor is μ and that between th

Question

A boy of mass M is applying a horizontal force to slide a box of mass M ′ on a rough horizontal surface. The coefficient of friction between the shoes of the boy and the floor is μ and that between the box and the floor is μ ′ . In which of the following cases is it certainly not possible to slide the box:

TestHub · Accepted Answer

The boy can push at most μ M g (his own grip), while the box needs more than μ ′ M ′ g to move. With μ < μ ′ AND M < M ′ , μ M g < μ ′ M ′ g certainly, so sliding is impossible. Option A.

Physics - NLM Question with Solution | TestHub

Options:

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