Question

A body of mass $M$ is resting on a rough horizontal plane surface, the coefficient of friction being equal to $\mu .$ At $t=0$, a horizontal force $F=F_{0} t$ starts acting on it, where $F_{0}$ is a constant, The time $T$ at which the motion starts is

(a) $\frac{\mu M g}{F_{0}}$

(b) $\frac{M g}{\mu F_{0}}$

(c) $\frac{\mu F}{M g}$

(d) $\frac{F}{F_{0}}$

Answer 1

The time $T$ at which the motion starts is $\frac{\mu M g}{F_{0}}$. So, The correct option of this question will be (A).