A hockey player uses a leaf blower to apply a constant force on a hockey puck. The puck accelerates in a straight line across the ice. Then another player applies an equally strong, constant force on the puck in the opposite direction. How will the puck move in response?
It will stop immediately.
It will slow down, then continue moving at constant velocity.
It will not slow down, but continue moving at constant velocity.
It will slow down and eventually stop.
