COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 8, Problem 96QAP
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We claim that momentum and angular momentum are conserved. Yet most moving or rotating objects eventually slow down and stop. Explain.
A solid disk with a mass of 32 kg and a radius of 27 cm is spinning counter-clockwise at 17 rad/s in the horizontal plane about its axis of symmetry. Another disk with half the mass and half the radius is spinning at 34 rad/s in the opposite direction when it drops onto the first disk, as shown in Figure 8-75.Find the final angular speed of the two disks when they eventually spin together.
20 - The position of a 5kg object moving in the xy- plane at any moment is defined by r = 4.i + 6tj (m). Find the angular momentum of the object.
A) 30i + 20k
B) 120k
C) 60i
D) 40j
E) 3k
Chapter 8 Solutions
COLLEGE PHYSICS
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