numerical-problem-2-work-power-and-energy-physics-11 June 1, 2020 A 70 kg man runs up a long flight of stairs in 4 seconds. The vertical height of the stair is 4.5 m. Calculate his power. 1 Comment Problem 2: A 70 kg man runs up a long flight of stairs in 4.0 seconds. The vertical height of the stair is 4.5 m.…