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# Momentum question watch

Snooker Ball A has a mass of 0.06kg

Snooker ball B has a mass of 0.055kg

Snooker ball A is moving with a velocity of 4m/s and hits snooker ball B which is stationary. Snooker ball B moves to the right with a velocity of 3m/s. What is the velocity of ball A after the collision and in what way does it move?

(Btw this was an exam question, would just like to know the answer, don't ever need to do this again!!)
2. Momentum before = Momentum A Before + Momentum B before
= 0.06 * 4 + 0.055 * 0
= 0.24 kgms^-1
Momentum after = Momentum before
Momentum after = 0.24kgms^-1
Momentum A After + Momentum B after = 0.24kgms^-1
0.06 * x + 0.055 * 3 = 0.24
x = 1.25
3. (Original post by Dench,x,Kid)
Momentum before = Momentum A Before + Momentum B before
= 0.06 * 4 + 0.055 * 0
= 0.24 kgms^-1
Momentum after = Momentum before
Momentum after = 0.24kgms^-1
Momentum A After + Momentum B after = 0.24kgms^-1
0.06 * x + 0.055 * 3 = 0.24
x = 1.25
Thanks, I combined the 2 masses for momentum after, hopefully I'll get some marks!

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