An object collides elastically (perfectly) with another object (identical object) at rest. If it is not a head on collision how can i PROVE that the angle between them afterwards is 90 degrees?(adsbygoogle = window.adsbygoogle || []).push({});

I have NO IDEA on what to do...it's been puzzling me and my friends for a little while now...

help anyone?

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# Perfectly elastic collisions (proof)

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