Asked by leon

A boulder flies through the air at 14.5 m/s with kinetic energy 310 J.
What's its mass?
What's the boulder's kinetic energy if its speed doubles?
What's the boulder's kinetic energy if its speed is halved?
Answered by Chanz
KE = 1/2 mv^2, solve for m
Once you've found m use the other two v's, same eq.
Answered by leon
thank you
2.95 kg
1240 J
77.5 J
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