Use the factor label method (or whatever your teacher calls it) to make the conversion. Use the fact that there are 12 inches in 1 foot to do this. [tex] \frac{32ft}{s ^{2} } * \frac{12in}{1ft} [/tex]. The feet labels cancel each other out leaving you with in per second squared. And when you multiply straight across the top you get 384 in per second squared, choice C
