m (a) a barbell with an axis of rotation through its center (b) a barbell with an axis of rotation through one end 2R |= 2MR2 | = 4MR2 (a) (b) 10. Comparing the two cases above with different axis of rotation, we can say that A. it is 2 times more difficult to rotate the barbell about its center than at one end. B. it is 2 times more difficult to rotate the barbell about the end than at the center. C. it is 4 times more difficult to rotate the barbell about its center than at one end. D. it is 4 times more difficult to rotate the barbell about the end than at the center. 11. If M = 10.0 kg, R = 1.00 m, and the mass of the bar is negligible, then the moment of inertia of rotating the barbell about the center is A. 10.0 kg.m2 B. 20.0 kg.m2 12. Particularly for the example above, %3D C. 30.0 kg.m2 D. 40.0 kg.m2 A. moving the axis of rotation farther from the center makes it easier to rotate the barbell. B. moving the axis of rotation to any point on the barbell will still give the same moment of inertia. C. moving the axis of rotation farther from the center makes it more difficult to rotate the barbell. D. moving the plates from the ends towards the center makes it more difficult to rotate the barbell.
m (a) a barbell with an axis of rotation through its center (b) a barbell with an axis of rotation through one end 2R |= 2MR2 | = 4MR2 (a) (b) 10. Comparing the two cases above with different axis of rotation, we can say that A. it is 2 times more difficult to rotate the barbell about its center than at one end. B. it is 2 times more difficult to rotate the barbell about the end than at the center. C. it is 4 times more difficult to rotate the barbell about its center than at one end. D. it is 4 times more difficult to rotate the barbell about the end than at the center. 11. If M = 10.0 kg, R = 1.00 m, and the mass of the bar is negligible, then the moment of inertia of rotating the barbell about the center is A. 10.0 kg.m2 B. 20.0 kg.m2 12. Particularly for the example above, %3D C. 30.0 kg.m2 D. 40.0 kg.m2 A. moving the axis of rotation farther from the center makes it easier to rotate the barbell. B. moving the axis of rotation to any point on the barbell will still give the same moment of inertia. C. moving the axis of rotation farther from the center makes it more difficult to rotate the barbell. D. moving the plates from the ends towards the center makes it more difficult to rotate the barbell.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Please answer 10,11,12 please
Transcribed Image Text:Refer to the following figure when answering items 10, 11, and 12.
m
m
(a)
rotation through its center
(b) a barbell with an axis of
rotation through one end
a barbell with an axis of
-2R-
| = 2MR2
| = 4MR2
(a)
(b)
10. Comparing the two cases above with different axis of rotation, we can say that
A. it is 2 times more difficult to rotate the barbell about its center than at one end.
B. it is 2 times more difficult to rotate the barbell about the end than at the center.
C. it is 4 times more difficult to rotate the barbell about its center than at one end.
D. it is 4 times more difficult to rotate the barbell about the end than at the center.
11. If M = 10.0 kg, R = 1.00 m, and the mass of the bar is negligible, then the moment of inertia
of rotating the barbell about the center is
A. 10.0 kg.m2
B. 20.0 kg.m2
C. 30.0 kg.m2
D. 40.0 kg.m2
12. Particularly for the example above,
A. moving the axis of rotation farther from the center makes it easier to rotate the barbell.
B. moving the axis of rotation to any point on the barbell will still give the same moment
of inertia.
C. moving the axis of rotation farther from the center makes it more difficult to rotate the
barbell.
D. moving the plates from the ends towards the center makes it more difficult to rotate the
barbell.
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