# Conservation of Momentum

## 10 questions

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• Multiple Choice
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5 minutes
1 pt
While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 10 m/s and the 8 ball was at rest. If both ball's have a mass of 0.15 kg and the cue ball's velocity after the collision is 2 m/s, what is the 8 ball's velocity?
2 m/s
8 m/s
-2 m/s
1.5 m/s
• Multiple Choice
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5 minutes
1 pt
In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.
0.5 m/s
1.0 m/s
0.33 m/s
0.67 m/s
• Multiple Choice
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5 minutes
1 pt
Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be:
2 m/s
3.4 m/s
4.6 m/s
7.1 m/s
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