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OpenStudy (anonymous):
A 20 kg object falls from a height of 30 meters. How many joules of kinetic energy will the object have just before it hits the ground?
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OpenStudy (mrnood):
the gain in KE = loss of PE PE = mgh where m= mass, g = acceleration of gravity on earth, and h = change in height You have all three factors : just put them in the equation and calculate the answer.
OpenStudy (anonymous):
my calculations are never right and it throws me off
OpenStudy (mrnood):
I am not going to do a simple multiplication for you
OpenStudy (shamim):
k.E=mgh=20*9.8*30
OpenStudy (shamim):
@bhNood
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OpenStudy (anonymous):
thanks
OpenStudy (shamim):
welcome
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