I need some help on how to solve this question, I don't really know how to do this at all.(adsbygoogle = window.adsbygoogle || []).push({});

A vessel at rest explodes, breaking into three pieces. Two pieces having equal mass, fly off perpendicular to one another with the same speed of 30 m/s. The third piece has three times the mass of each other piece. What are the magnitude and direction of it's velocity immediately after the explosion?

I was told that the sum of the potential energy has to equal the final kinetic energy, but isn't there no potential energy at the beginning?

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# Homework Help: A system of particles

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