A puck of mass 0.20 kg is sliding on ice with a constant velocity of 15.0 m s-1. A hockey stick exerts a force on the puck, for a short period of time, in the opposite direction to the velocity of the puck. The momentum of the puck changes by 3.8 kg m s-1.
Ignore friction.
What is the speed of the puck when it leaves the hockey stick?
4.0 m s−14.0\text{ m s}^{-1}4.0 m s−1
11.2 m s−111.2\text{ m s}^{-1}11.2 m s−1
19.0 m s−119.0\text{ m s}^{-1}19.0 m s−1
34.0 m s−134.0\text{ m s}^{-1}34.0 m s−1