If a 70kg man is running 3 m/s horizontally, how many watts is he consuming?
W = N-m/s
N = mass*acceleration
The Attempt at a Solution
I would assume that in order to get the force in N one would use the gravitational constant of the Earth, but the man is moving in a horizontal line. Regardless, he is technically using work to move 'up' since his center of mass is going slightly up and down. How do I account for this, however?