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mikaelaq23
Dec 3, 2009, 04:27 AM
During a workout, a person repeatedly lifts a 12 lb barbell through a distance of 1.5 ft. How many "reps" of this lift are required to burn off 105 Cal?

I know you use the equation, Q=mgh
m=5.448 kg
height = .4572m

use these conversions instead of above.
its easy to find Q, but what I don't know is how to find how many reps the person shoud do to lose the calories...

Unknown008
Dec 3, 2009, 09:09 AM
You have to convert joules that you got into calories, or calories required into joules required.

Then, divide the required amount by the energy spent on each 'rep'.

I hope it helped! :)