Two objects with a mass of 4kg are sliding across ice at a constant velocity of 12 m/s east. After an explosive charge seperates the two masses, they are found to be travelling at 50 degrees north of east and 50 degrees south of east respectively. What is the change in kinetic energy of the system?(adsbygoogle = window.adsbygoogle || []).push({});

I got as far as to find out the inital kinetic energy from Ek = 1/2mv^2, but I'm not sure what to do next? Thanks.

(BTW, I hope this is in the right section...)

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# Homework Help: Momentum/Kinetic Energy

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