ALSO d=(1/2)(a)(t2), soooo if a ball were to fall for, lets say, 5 seconds, then it would have fallen a distance of 20m. because of a (gravity, or 10) divided by 2, times 5 squared, isss 20m.
or its all something like that, but what im confused on is, how you figure out when something runs out of energy if you throw it straight up, and i'm unsure as to why all the letters in the equation are what they are, and it really confuses me. and when the initial velocity is not zero, i'm not sure on what to do then.
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