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Setler79 [48]
3 years ago
5

A 170-lb man carries a 10-lb can of paint up a helical staircase that encircles a silo with radius 15 ft. if the silo is 40 ft h

igh and the man makes exactly two complete revolutions, how much work is done by the man against gravity in climbing to the top? ft-lbs
Physics
1 answer:
goldenfox [79]3 years ago
4 0
Work done against the gravity = Total weight*Vertical distance covered.

Total weight = 170+10 = 180 lb
Vertical distance covered = 40 ft

Therefore,

Work done = 180*40 = 7200 lb-ft
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<span>Well, since it's in the shape of a wheel and the person walks around the edge of it, they must have a centripetal acceleration. Since a=v^2/r you can solve for "v" using 2.20 as your "a" and 59.5 as your "r" (r=half of the diameter).
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