Answered

If one horsepower is equal to 746 watts, how much horsepower does a highly trained athlete generate by doing 340 joules of work per second for an hourOne

Answer :

AL2006

746 joules per second = 746 watts = 1 horsepower

340 joules per second = 340 watts = (340/746) = 0.456 horsepower

Power is a RATE or a SPEED of doing work.  

How long you do it doesn't matter.  

Just like 30 miles per hour doesn't change whether you do it for an hour or for 10 minutes.

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