Physics (Energy and Momentum)
posted by Andrew .
A body of 5.10 kg mass makes an elastic collision with another body at rest and continues to move in the original direction, but with onefourth of its original speed. What is the mass (in kilograms) of the struck body?
Assuming a perfectly elastic collision, KEi=KEf
ive tried solving this many ways and i keep ending up with 2 equations and 3 unknowns.
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