Question

A woman exerts a constant horizontal force on a large box. As a result, the box moves across a horizontal floor at a constant speed "vo".
1. The constant horizontal force applied by the woman:
a. has the same magnitude as the weight of the box
b. is greater than the weight of the box
c. has the same magnitude as the total force which resists themotion of the box
d. is greater than the total force which resists the motion ofthe box
e. is greater than either the weight of the box or the totalforce which resists its motion

Answer 1

Answer:C

Explanation:

When a constant horizontal force is applied to the box, box started moving in the horizontal direction such that it moves with constant velocity $v_0$

Constant velocity implies that net force on the box is zero

i.e. there must be an opposing force which is equal to the applied force and friction force can serve that purpose.

So option c is the correct choice.