Question

A 0.2 kg hockey puck moving at 80 m/s is caught by a 40 kg goalie at rest. With what speed does the goalie slide on the slide?

Answer 1

V = 0.39 m/s

Step-by-step explanation:

Given that,

Mass of hockey puck, m = 0.2 kg

Mass of goalie = 40 kg

Speed of hockey puck, v = 80 m/s

We need to find the speed with which the goalie slide on the slide. Let V be the speed. Using the conservation of momentum as follows :

`mv=(M+m)V\\\\V=(mv)/(M+m)\\\\V=(0.2* 80)/(0.2+40)\\\\V=0.39\ m/s`

So, the required speed is 0.39 m/s.