RoCu

A farmhand pushes a 23kg bale of hay 4.0m across the floor of a barn. If she exerts a horizontal force of 91N on the hay, how much work has she done?

A) The average power output of the human heart is 1.33 watts. How much energy does the heart produce in a day? B) Compare the energy found in part (a) with the energy required to walk up a flight of stairs. Estimate the height a person could attain on a s...