Question

Assume that running consumers 100 calories per mile. If you run 10 minute miles, what is your average power output, in watts, during a 1-hour run?

Answer 1

OK, first step ... how many miles per hour are you running?

Answer 2

six?

Answer 3

yes indeed, so if you're consuming 100 calories per mile and running 6 miles per hour, how many calories per hour?

Answer 4

600- but how do you setup in fraction form? That is the part I get confused when setting up in this form.

Answer 5

i'm not sure what you mean ... 600 calories / hour is right so far. now you have to use unit conversions to get that to watts, which is joules / second.

Answer 6

I have to put into dimensional analysis form and show the conversion from start to finish. This is my struggle.

Answer 7

you probablu have reference material that tells you how to convert from calories to joules, since they're both measures of energy, and then convert the denominator from hours to seconds.

Answer 8

Yes, reading that now.

Answer 9

100 cal / mile * 6 miles / hour * ?? hours / second * ?? joules / calorie gets you to joules/second, which is the definition of a watt.

Answer 10

Thanks so much! This should get me there..

Answer 11

I am happy to hear this.