Question

A body of weight $50N$ is placed on rough surface. If the minimum force required to move the body on the smooth surface is $30N$, then coefficient of friction is:

• A. $0.6$
• B. $0.8$
• C. $0.3$
• D. $0.45$

Answer 1

The correct option is A $0.6$

We know:
$F=\mu mg$

$\therefore \mu =\frac{F}{mg}$

$\therefore \mu =\frac{30}{50}$

$\therefore \mu =0.6$