College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 9, Problem 28P
A slender metal rod has a mass M and length L. The rod is first rotated about a perpendicular axis through its center with an
Figure 9.27 Problem 28.
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A disk-shaped motor component is running with angular velocity ω0=16.26 rad/s around its axis of symmetry, as shown in the figure below. The disc has mass M=0.36 kg (evenly distributed) and radius R=8.5 cm. A work is done on the disk, causing it to increase its rotational kinetic energy by 75%. What is the new angular velocity ω1 of the disk?
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a. 28,5 rad/s
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c. 32,3 rad/s
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without friction. The bar has mass 70.0 g and is 90 cm in length.
The bug jumps off in the horizontal direction, perpendicular to the
bar, with a speed of 25.0 cm/s relative to the table.
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rad/s
A slender metal rod has a mass MM and length LL. The rod is first rotated about a perpendicular axis through its center with an angular velocity ωω (see figure (a) below). It is then rotated about a perpendicular axis through its end at the same angular velocity (see figure (b) below).
Part A
Find the ratio of the kinetic energy of the first case to that of the second case.
Express your answer using three significant figures.
Chapter 9 Solutions
College Physics (10th Edition)
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