Asked by ricajane
ursula and her 2 year old daughter unice descend a flight of stairs 10 m high, if ursula carries unice and their combined mass is 75 kg and reach the ground in 8 seconds. compute for
a.) work done in going down
b.) power developed by ursula in going down
a.) work done in going down
b.) power developed by ursula in going down
Answers
Answered by
drwls
a) W = -M g H
b) P = -M g H/t
The minus sign means gravity does work on Ursula, going down the stairs.
M = 75 kg
g = 9.8 m/s^2
H = 10 m
t = 8 s
P is in Watts
b) P = -M g H/t
The minus sign means gravity does work on Ursula, going down the stairs.
M = 75 kg
g = 9.8 m/s^2
H = 10 m
t = 8 s
P is in Watts
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