A hockey puck with a mass of 0.16 kg travels at a velocity of 40 m/s toward a goalkeeper. The goalkeeper has a mass of 120 kg and is at rest. Assuming a closed system, find the total momentum of the goalkeeper and puck after the puck is caught by the goalkeeper. In 3-4 sentences, identify the object with the greater momentum after the puck is caught and explain your reasoning.(4 points)

Question

Instead of giving the straight up answer can you also explain the reasoning? Please Help me :(

Answer 1

total momentum does not change, assuming the goalie starts to slide away unhindered by friction.

Naturally, though, the velocity of the goalie would probably be zero, as he digs in his skates.