Posted by **Amber** on Tuesday, October 5, 2010 at 7:00pm.

Assuming 100% of your energy can be converted to electrical power, and electricity costs $0.10 for 1 kilowatt-hour, how high should you climb to make one penny's worth of electricity? Show all work & units.

I have 288.8 watts, and that's as far as I have been able to reach.

- Physics -
**bobpursley**, Tuesday, October 5, 2010 at 7:08pm
so you want to climb the quivelant of 10 cents.

10kw*hr=10kw*3600sec=3.6E4joules

3.6E4joules=mgh

So you have to put your weight (mg, in Newtons) and solve for h

Hint: 1N =.225 lb (force)

so if I weigh 150 lbs, then weight in newtons is 150/.225=667N

3.6E4=667N*h

h=54m

check all that.

- Physics -
**Amber**, Tuesday, October 5, 2010 at 7:12pm
It actually wants to find how far you could climb with a penny.

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