A body of mass M is kept on a rough horizontal surface (friction coefficient = μ ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surf

Question

A body of mass M is kept on a rough horizontal surface (friction coefficient = μ ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on the body is F , where:

TestHub · Accepted Answer

The surface force is the resultant of the normal reaction $M g$ and the static friction $f$ with $0 \leq f \leq μ M g$
$F = (M g)^{2} + f^{2}$
ranging from $M g$ (no applied force) to $M g 1 + μ^{2}$ (limiting friction).
Option C.

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