A brick is lifted to a given height and then dropped to the ground. Next, a second brick, which weighs twiceas much as the first, is lifted just as high as the first and then it too is dropped to the ground. When the second brick strikes the ground it has:
a) half as much kinectic energy
b) as much kinectic energy as the first
c) twice as much kinectic energy as the first
d) four times as much kinectic energy as the first
As always, decide on only one answer. A correct answer accompanied by a correct explanation beats a correct answer by itself.
I believe that I already know the answer (please don't let me be wrong!) to the question. I offer this question for the challenge of solving it as well as for the educational value.
If you don't like the question (for whatever reason) just move on to another. There are pleanty more!
Onwards to glory (and points!)
2007-07-09
05:02:53
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