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A phonograph record of Mozart's N.41 Symphony is whirling around at 103 rpm. Two balls, each of mass 1 × 10-1 kg, are sitting on the disk, and are at rest with respect to the disk. The first one, "ball 1" sits the end of the paper label, 5 cm from the center of the record. The second one, 2, sits 10 cm out from the center, on the very edge of the record, as shown in the figure. What is the ratio of the friction forces acting on them? Ratio = (friction on ball 2/friction on ball 1) ball a) 0.5 b) 2 c) 1 d) 0.25 e) Not enough information to determine. 4. A wheel is spun up from rest by application of a force applied to the rim of the wheel. Consider the wheel to be in the plane of the paper, rotating 5. clockwise. This force must point in what direction? a) Towards the center of the wheel. b) Into the page. c) At the top of the wheel pointing left. d) At the bottom of the wheel, pointing right. e) It is impossible to tell with the information given.

A phonograph record of Mozart's N.41 Symphony is whirling around at 103 rpm. Two balls, each of mass 1 × 10-1 kg, are sitting on the disk, and are at rest with respect to the disk. The first one, "ball 1" sits the end of the paper label, 5 cm from the center of the record. The second one, 2, sits 10 cm out from the center, on the very edge of the record, as shown in the figure. What is the ratio of the friction forces acting on them? Ratio = (friction on ball 2/friction on ball 1) ball a) 0.5 b) 2 c) 1 d) 0.25 e) Not enough information to determine. 4. A wheel is spun up from rest by application of a force applied to the rim of the wheel. Consider the wheel to be in the plane of the paper, rotating 5. clockwise. This force must point in what direction? a) Towards the center of the wheel. b) Into the page. c) At the top of the wheel pointing left. d) At the bottom of the wheel, pointing right. e) It is impossible to tell with the information given.

Physics for Scientists and Engineers: Foundations and Connections
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter13: Rotation Ii: A Conservation Approach
Section: Chapter Questions
Problem 71PQ: A long, thin rod of mass m = 5.00 kg and length = 1.20 m rotates around an axis perpendicular to...
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A phonograph record of Mozart's N.41 Symphony is whirling around at 103 rpm. Two balls, each of mass 1 × 10-1 kg, are sitting on the disk, and are at rest with respect to the disk. The first one, "ball 1" sits the end of the paper label, 5 cm from the center of the record. The second one, 2, sits 10 cm out from the center, on the very edge of the record, as shown in the figure. What is the ratio of the friction forces acting on them? Ratio = (friction on ball 2/friction on ball 1) ball a) 0.5 b) 2 c) 1 d) 0.25 e) Not enough information to determine. 4.
Transcribed Image Text:A phonograph record of Mozart's N.41 Symphony is whirling around at 103 rpm. Two balls, each of mass 1 × 10-1 kg, are sitting on the disk, and are at rest with respect to the disk. The first one, "ball 1" sits the end of the paper label, 5 cm from the center of the record. The second one, 2, sits 10 cm out from the center, on the very edge of the record, as shown in the figure. What is the ratio of the friction forces acting on them? Ratio = (friction on ball 2/friction on ball 1) ball a) 0.5 b) 2 c) 1 d) 0.25 e) Not enough information to determine. 4.
A wheel is spun up from rest by application of a force applied to the rim of the wheel. Consider the wheel to be in the plane of the paper, rotating 5. clockwise. This force must point in what direction? a) Towards the center of the wheel. b) Into the page. c) At the top of the wheel pointing left. d) At the bottom of the wheel, pointing right. e) It is impossible to tell with the information given.
Transcribed Image Text:A wheel is spun up from rest by application of a force applied to the rim of the wheel. Consider the wheel to be in the plane of the paper, rotating 5. clockwise. This force must point in what direction? a) Towards the center of the wheel. b) Into the page. c) At the top of the wheel pointing left. d) At the bottom of the wheel, pointing right. e) It is impossible to tell with the information given.
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