Physics help pls?
2017-12-08 10:43 am
In a game of eight ball billards the cue ball strikes the eight ball at a velocity of 4.7 m/s and afterward slowly rolls at a velocity of 2.2 m/s. If the eight ball was at rest before the collision, what is its final velocity after being hit? (Both have the same mass)
回答 (1)
2017-12-08 10:26 pm
✔ 最佳答案
To solve this, we must assume a linear collision (no "glancing blows"). Conserve momentum:M*4.7m/s + 0 = M*2.2m/s + M*V → mass M cancels
V = 2.5 m/s
Hope this helps!
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