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

A ball of mass 2m is moving with a velocity V_{o}collides elastically and head-on with another ball of mass m at rest.

Find the minimum kinetic energy of the system.

2. Relevant equations

K = 1/2 mv^{2}

3. The attempt at a solution

I personally do not understand what is expected of me here. The answer expected is

(2mV_{o}^{2})/3.

But collision is elastic. And I have to find the Kinetic energy of thesystem. Won't the Kinetic energy of thesystemremain constant (mV_{o}^{2}) throughout?

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# Homework Help: Concerning Elastic collisions and Kinetic energy

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