Physics
7th Edition
ISBN: 9780321733627
Author: Douglas C. Giancoli
Publisher: PEARSON
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Textbook Question
Chapter 5, Problem 11P
How many revolutions per minute would a 25-m-diameter Ferris wheel need to make for the passengers to feel “weightless" at the topmost point?
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A rock is dropped from high above the surface of the Earth.
The initial speed is 0, and the initial height above the
surface is NxRg where Rg is the radius of the Earth. Calculate
the speed of the rock when it hits the upper atmosphere, say
at height 20 km above the surface.
DATA for the Earth:
radius Rg = 6.38 x 108 m; mass M = 5.98 x 1024 kg.
N = 9;
(in m/s)
OA: 7.258x103 OB: 1.052×104 OC: 1.526x104 OD: 2.213x104 OE: 3.208x104 OF: 4.652x104 OG: 6.746x104 OH: 9.781x104
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a cylindrical tube 58 ft long with a radius of 29 ft (see figure). If a rider sits in a chair at the end of one arm facing
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rev/min
29 ft
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An 80 kg person riding a Ferris wheel moves in a vertical circular trajectory of radius 6 m. As the person reaches the lowest point, a scale that the person is sitting on reads 920 N. There is nothing else in contact with the person. The person's speed is ____ m/s.
Chapter 5 Solutions
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