Question

A wooden block of mass 2kg is placed on a horizontal surface. A horizontal force of 14N is exerted on it which makes it to accelerate at 5ms^-1.
Find the frictional force acting between the surfaces.

Answer 1

F=ma
F= 2x5 = 10N
Fr= Force applied - resultant force - Formula can be implied substitution
= 14-10
=4N