Question

A block is placed on a rough horizontal surface. The minimum force required to slide the block is ( $\mu$ is coefficient of friction between the contacting surface)

Answer 1

REF.Image.

Solution

minimum force required

to move it will be

equal to the sliding

friction b/w the blank and the surface

$fs$ (sliding friction) = $\mu N$

Here,

N = Mg so,

$fs=\mu Mg$

Thus, the minimum force required

will be ${}^{\prime }{\mu }^{\prime }$ times the weight

of block.