Responding to an alarm, 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.
(a) Obtain the average force exerted by the pole on the fireman.
(b) If the landing speed is half that in part (a), is the average force exerted on the fireman by the pole doubled?
(c) Obtain the average force exerted on the fireman by the pole when the landing speed is 2.1 m/s.