During one part of a race, a swimmer's velocity does not change. The water exerts a forward force on the swimmer, while drag acts backwards. These are the only horizontal forces on the swimmer. What is the relationship between the sizes of the forward force and the drag?
The drag is greater in size than the forward force.
The forward force is greater in size than the drag.
The forward force is equal in size to the drag.
The forward force and the drag are both zero.