How much power does an average person input into their body

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

Photons with the highest energy have the longest period