You can't have the bat as an integration limit and the integration variable!
(If you're serious about the question, just set P.E. = K.E. One of these, hint: the P.E., will be position dependent (x, r, d, or whatever you called it), so just solve for that. I'll give you more hints if you need them.)
Well, it's done a LOT in the first few years of calc, but strictly speaking it's incorrect. Really, a dummy variable should be used (usually x' or what have you).
(If you're serious about the question, just set P.E. = K.E. One of these, hint: the P.E., will be position dependent (x, r, d, or whatever you called it), so just solve for that. I'll give you more hints if you need them.)
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that batman one made me laugh for hours.
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integral from 0 to x of y^2 dx is just x(y^2), isn't it? I mean, the logic applies to when you're doing double and triple integrals, as far as I know.
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