Kenny is climbing the stairs of his apartment building for exercise. Kenny weighs 83 kg and the height of a single step on the staircase is 11 inches. He climbs a flight of stairs in 4.0 seconds.
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Kenny is climbing the stairs of his apartment building for exercise. Kenny weighs 83 kg and the height of a single step on the staircase is 11 inches. He climbs a flight of stairs in 4.0 seconds.
a.) calculate the rate at which the stairs can be climbed considering the given information (stairs per second).
b.) How long can kenny sustain this pace (so like, continuously climbing the stairs and not leaping up a bunch of stairs at one instant)?
c.) Why does Kenny descend stairs at a faster rate for a nearly unlimited time although very similar forces are exerted descending as they are ascending?(This points to a fundamentally different process for descending versus climbing stairs.)
Given :m=83kg
h=11 inches per step=0.27m
Change in potential energy =mgh-0= 83*10*0.27=224.1J
The rate at which the stairs can be climbed=W/time=224.1/4 secs=56.02W
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