I need help on these three questions now 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?
2. A 200-kg boulder has 39,200 joules of gravitational potential energy. What height is it at?
3. A 1-kg model airplane has 12.5 joules of kinetic energy and 98 joules of gravitational potential energy. What is its speed? What is its height?
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heres the answer....
gravitational PE = mgh
and KE = 1/2 m v^2
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conoamani:
I didn't understand
ok What is that on the second line on question 1
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