Polly is pushing a box to the right across the floor with a force of 30 N. The force of gravity is 8 N, and the normal force is 8 N. Which value could describe the force of friction if Polly could not move the box?

Answer 1

If Polly cannot move the box, it means that the force of friction acting on the box is equal to or greater than the force that Polly is applying. In this case, since she is applying a force of 30 N to the right, the force of friction must be at least 30 N to prevent the box from moving.

Therefore, the force of friction could be a value of 30 N or greater.