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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. I dont know what the equation to do this is.. can someone help me please?
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OpenStudy (anonymous):
The kinetic energy it has just before reaching the ground will be the same as the gravitational potential energy it initially has. Find the gravitational potential energy like this:\[\color{green}{E_g = mgh}\]
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