A box is initially at rest on a frictionless surface. It then experiences two forces, as shown in the picture.

20 N BOX 18 N

Which best describes what will happen to the box?

A. It will move at a constant speed to the left.

B. It will move at a constant speed to the right.

C. It will move at an increasing speed to the left.

D. It will move at an increasing speed to the right.

A. It will move at a constant speed to the left.

Since the forces are equal in magnitude but in opposite directions (20 N to the right and 18 N to the left), they will cancel each other out resulting in a net force of 2 N to the right. The box will move at a constant speed to the left due to this net force.