Question

A body of mass 2 kg is placed on a horizontal surface having kinetic friction 0.4 and static friction 0.5 If force applied on body is 20 Newton find acceleration of body

Answer 1

Minimum force required = Limiting friction
= μN
= μmg
= 0.5 * 2 * 10
= 10 N

External force=20N

Force acting on the body=External force-limiting friction

=20-10=10N

So, Ma=10

a=10/2=5m/s^2