A hockey puck with a mass of 0.18 kg travels at a velocity of 35 m/s toward a goalkeeper. The goalkeeper has a mass of 130 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.
To find the total momentum of the goalkeeper and puck after the puck is caught, we can use the principle of conservation of momentum. Momentum is calculated by multiplying mass and velocity. Initially, the momentum of the puck is 0.18 kg * 35 m/s = 6.3 kg*m/s because the goalkeeper is at rest. After the puck is caught, both the puck and goalkeeper will have the same final velocity of 0 m/s as they move together. Therefore, the total momentum of the goalkeeper and puck after the puck is caught is 130 kg * 0 m/s + 0.18 kg * 0 m/s = 0 kg*m/s. The object with the greater momentum after the puck is caught is the puck because its initial momentum is greater than zero, while the goalkeeper's momentum is zero.
