Question

Compute the mechanical power provided by the interal force within the body of a person of mass 80 kg who run up a flight of stairs rising a verticial distance of 3m in 3s.

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Answer 1

Explanation:

Rigid body rotation occurs when a fluid is rotated without relative motion of fluid particles. This is the case, for example, of a fluid placed in a cylindrical container on top of a turntable rotating with a constant angular velocity, Ω0. After some time elapses, a steady state is achieved, in which the tangential velocity varies linearly with radial distance, r, while both the radial and axial components of the velocity vector vanish

Answer 2

Answer:

If the body's KE is approximately constant during climb, the only change in energy is the gravitational potential energy which is mgh =(80×9.8×3)J=2352J. Thus, power, 2352J3s=784W