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February 28, 2015

Homework Help: Physics( Checking answer)

Posted by Cory on Sunday, October 31, 2010 at 3:29pm.

Sorry for re-posting but I really need to know if I did it right. Please someone help!

Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies?

I got 60 for the first bullet and 120 for the second. I am not sure I used the formula correctly and I do not know how to obtain the "ratio" for kinetic energies. I would appreciate any help

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