Question

A body of weight $50N$ is dragged on horizontal surface with a force of $28.2N$. The frictional force acting on the body and the normal force will be

• A. $2N,3N$
• B. $5N,7N$
• C. $10N,15N$
• D. $20N,30N$

Answer 1

The correct option is D $20N,30N$

From FBD, the friction force,$F_f=\mu N=F\cos 45=28.2\cos 45=20N$
for Normal force, $N+F\sin 45=50,\Rightarrow N=50-20=30N$
Ans:(D)