Hello, I was just wondering if I am doing this question correctly, if not, any suggestions please and thank you(adsbygoogle = window.adsbygoogle || []).push({});

A person takes aim at the eight bal in a game of billiards. Her shot gives the cue ball a velocity of 2.5m/s [forward]. The cue ball strikes the eight ball and continues with a velocity of 2.5 x 10^-1 m/s [forward]. If the mass of the cue ball equals the mass of the eight ball equals 400g, calculate the velocity of the eight ball after collision.

v1 of cueball = 2.5m/s [forward]

v2 of cueball = 2.5 x 10^1 m/s [forward]

m = 400g = .4kg

P1 = m1v1

P1 = 0.4(2.5)

P1 = 1 m/s

P2 = m2v2

P2 = 0.4(2.5 x 10^1)

P2 = 0.1 m/s

Ptotal = [(0.1)^2 + (1)^2]sqaure root

Ptotal = 1.0 m/s

Pafter = m1v1 + m2v2

1 = (0.4kg + 0.4kg)v

v = 1/0.8

v = 1.25 m/s

Thanks!

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# Homework Help: Calculate the velocity of the eight ball after collision

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