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OpenStudy (anonymous):
Predicting the kinetic energy of an object from gravitational potential energy?
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OpenStudy (anonymous):
A ball that's mass is 5 kg is lifted 1km above the ground, it has GPE of = mgh = 49 kJ of energy. If Work = Fd = 49 kJ F = W/d = 49kJ/ 1000 = 49N of gravitational force.
OpenStudy (anonymous):
acceleration = 9.8 m/s ^2 ( a = F/m)
OpenStudy (anonymous):
Now velocity = d/t
OpenStudy (anonymous):
s = 1/2 at^2 thus, t = 14.2 seconds.
OpenStudy (anonymous):
V = 1000/14.2 = 70.4 m/s
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OpenStudy (anonymous):
might want to post this in the science section
OpenStudy (anonymous):
SHOOT!
OpenStudy (anonymous):
LOLZ
OpenStudy (anonymous):
Just realized lol... thanks though.
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