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A 160-lb man carries a 25-lb can of paint up the helical staircase that encircles a silo with a radius of 20 ft. If the silo is 90 ft high and the man makes exactly three complete revolutions. How much work is done by the man against gravity in climbing to the top?

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Sadha
SadhaLv10
15 Dec 2020

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A small rock with a mass 0.14 kg is released from rest at point A, which is at the top edge of a large, hemispherical bowl with radius R = 0.56 m (the figure (Figure 1) ). Assume that the size of the rock is small compared to R, so that the rock can be treated as a particle, and assume that the rock slides rather than rolls. The work done by friction on the rock when it moves from point A to point B at the bottom of the bowl has magnitude 0.22 J.

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Between points A and B, how much work is done on the rock by gravity?

What is the speed of the rock as it reaches point B?

Of the three forces acting on the rock as it slides down the bowl, which (if any) are constant and which are not? Explain.

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