(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 8.5 kg steel ball, travelling left to right at 12 m/s, undergoes an elastic collision with a 5 kg steel ball at rest. To the nearest Joule, what is the Total Kinetic Energy of the two balls after collision? If the first ball has a mass of 10 kg and the second ball is travelling at it with a speed of 3 m/s, what is the velocity, to one decimal place, of the first ball after collision? What is the velocity of the second ball to one decimal place?

2. Relevant equations

1/2mv_{i}^{2}+1/2mv_{ii}^{2}=KE

3. The attempt at a solution

Question 1:

1/2 (8.5)(12^{2})= 612 J

Question 2 & 3:

I'm not sure the equation needed to solve for the needed. I'm pretty sure that if I can get question 2 then the same method will be used to solve question 3.

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# Homework Help: Kinetic Energy and a Collision

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