Q. A body of mass 2 kg is kept by pressing to a vertical wall by a force of 100 N. The friction between wall and body is 0.3. Then the frictional force is equal to
A) 6 N
B) 20 N
C) 600 N
D) 700 N
Explanation
(b) Weight of body $= 2 \times 10 = 20$ N
This force has the tendency to move the block, so friction force = 20 N.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.