Question

A box of mass 25kg is pushed horizontally over a rough surface with a force of 400N. The box moves with a constant acceleration of 12meters per square. Calculate the frictional force present.

Answer 1

We can use Newton's second law of motion to solve this problem.

The force acting on the box is the pushing force minus the frictional force:

F = ma
400N - f = 25kg x 12m/s^2
400N - f = 300N
f = 100N

Therefore, the frictional force present is 100N.