# High speed stroboscopic photographs show that the head of a 200-g golf club is traveling at 55m/s just before it strikes a 46-g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 40m/s. Find the speed of the golf ball just after impact

65.2 m/s

Explanation:

We are given that

Mass of golf club=m=200 g=

1 kg=1000 g

Mass of golf ball=m'=46 g=

Initial velocity of golf club==55m/s

Final velocity of golf club=

Initial velocity of golf ball=0m/s

By conservation law of momentum

Total initial momentum=Final total momentum

Substitute the values

Hence, the speed of the golf ball just after impact=65.2 m/s

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