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## Homework Statement

I really need help on these two problems, I am not sure where to start and for that reason I do not have an attempt at the problem. I am not asking for anyone to do them for me , but could somone give me the equations or the steps needed to solve?

1. I expend 700 Calories (food or kcal) in riding my bicycle for 30 minutes. What was my average power during my ride?

2. NASA builds a 100 meter high roller coaster on the Moon. The gravitational force on the Moon is 1/6 that of earth. Will the roller coaster car being traveling faster at the bottom of the track on the Earth or the Moon. How much faster or slower will it be going?