Question

64. A block of mass 20kg is placed on a rough horizontal plane and a horizontal force of 12N is applied. If coefficient of friction is 0.1 the frictional force acting on it is, 1) 20 N 2) 12 N 3) 8 N 4) 28 N​

Answer 1

Answer:

3. 8 N

Explanation:

normal reaction= 20g = 200 N

friction = - (0.1× 200 )= -20 N

therfore net force= 20-12 = 8 N