A 102 kilogram fireman slides down a pole to the ground floor, 3.3 meter below. The fireman starts at rest and lands with a speed of 4.2m/s. Need to determine the average force exerted on the fireman by the pole? If the landing speed is half that in the first answer is the average force exerted on the fireman by the pole doubled? Why? And find the average force exerted on the fireman by the pole when the landing speed is 2.1 m/s.