A girl pushes a suitcase on a rough floor with a horizontal force of 40N. The floor exerts a frictional force of 40N in the opposite direction. The suitcase was initially at rest. What will the suitcase do?
(a) It will accelerate in the direction of the push.
(b) It will move with uniform speed because the forces are balanced.
(c) It will stay at rest because the forces are balanced.
(d) It will first move and then come to rest because of friction.