A block of mass M is being pulled along rough horizontal surface. coefficient of friction between bl

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4-2.Friction

easy

A block of mass $M$ is being pulled along rough horizontal surface. The coefficient of friction between the block and the surface is $\mu $. If another block of mass $M/2$ is placed on the block and it is again pulled on the surface, the coefficient of friction between the block and the surface will be

A

$\mu $

B

$3\mu /2$

C

$2\mu $

D

$5\mu /2$

Solution

Coefficient of friction is independent of the normal reaction. Hence, it will remain same.

Standard 11

Physics

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