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

An object of mass 15kg going to the right with a speed of 3 m/s collisdes with a 10kg object at rest. if the collision is ocmpletely elastic, calculate the speed of the 10kg object after collision

2. Relevant equations

m_{1}v_{li}+m_{2}v_{2i}=m_{1}v_{lf}+m_{2}v_{2f}

3. The attempt at a solution

I have tried plugging all the answers in and can't get the answer that is in the book. Also wondering if there is an easier way to get the answer. Also wondering if the # for at rest is 0

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# Calculating Speed in Elastic collision

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