Jamie R.

asked • 11/12/19

How high can a hike climb with the energy from a candy bar?

A candy bar label says it has 240 Calories (240,000 calories). Typical efficiency of energy conversion for a human is 25%.

If a 68kg person were to use the energy in the candy bar to climb a mountain how high could he go?

For this I know Ki+Ui=Kf+Uf. Then I think Ui and Kf will be 0. So Ki=Uf or 1/2mv^2=mgy? I’m not sure where to go from there.


If he climbs that distance in an hour what would be the average power exerted?

p=w/t? how do I get work?

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