car completes the turn in 36.0 s. (a) Determine the car's speed. (b) What is the magnitude and direction of the acceleration when the car is at point B? Figure P7.15 23. 16. It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its 24 surface equals the free-fall acceleration on Earth? 17. (a) What is the tangential acceleration of a bug on the rim of a 10.0-in.-diameter disk if the disk accel- erates uniformly from rest to an angular speed of 78.0 rev/min in 3.00 s? (b) When the disk is at its Unless otherwise noted, all content on this page is CengageLearning | Problems 233 final speed, what is the tangential velocity of the bug? One second after the bug starts from rest, what are its (c) tangential acceleration, (d) centripetal accelera- tion, and (e) total acceleration? 18. An adventurous archeologist (m 85.0 kg) tries to cross a river by swinging from a vine. The vine is 10.0 m long, and his speed at the bottom of the swing is 8.00 m/s. The archeologist doesn't know that the vine has a breaking strength of 000 N. Does he make it across the river without falling in? cord is fixed and
car completes the turn in 36.0 s. (a) Determine the car's speed. (b) What is the magnitude and direction of the acceleration when the car is at point B? Figure P7.15 23. 16. It has been suggested that rotating cylinders about 10 mi long and 5.0 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its 24 surface equals the free-fall acceleration on Earth? 17. (a) What is the tangential acceleration of a bug on the rim of a 10.0-in.-diameter disk if the disk accel- erates uniformly from rest to an angular speed of 78.0 rev/min in 3.00 s? (b) When the disk is at its Unless otherwise noted, all content on this page is CengageLearning | Problems 233 final speed, what is the tangential velocity of the bug? One second after the bug starts from rest, what are its (c) tangential acceleration, (d) centripetal accelera- tion, and (e) total acceleration? 18. An adventurous archeologist (m 85.0 kg) tries to cross a river by swinging from a vine. The vine is 10.0 m long, and his speed at the bottom of the swing is 8.00 m/s. The archeologist doesn't know that the vine has a breaking strength of 000 N. Does he make it across the river without falling in? cord is fixed and
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter4: Motion In Two And Three Dimensions
Section: Chapter Questions
Problem 64P: A runner taking part in the 200-m dash must run around the end of a track that has a circular arc...
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Question 17 please. the top of page 233 contains the second part of the question.
Thanks
Transcribed Image Text:car completes the turn
in 36.0 s. (a) Determine
the car's speed. (b) What
is the magnitude and
direction of the acceleration when the car is at point B?
Figure P7.15
23.
16. It has been suggested that rotating cylinders about
10 mi long and 5.0 mi in diameter be placed in space
and used as colonies. What angular speed must such a
cylinder have so that the centripetal acceleration at its 24
surface equals the free-fall acceleration on Earth?
17. (a) What is the tangential acceleration of a bug on
the rim of a 10.0-in.-diameter disk if the disk accel-
erates uniformly from rest to an angular speed of
78.0 rev/min in 3.00 s? (b) When the disk is at its
Unless otherwise noted, all content on this page is CengageLearning
Transcribed Image Text:| Problems
233
final speed, what is the tangential velocity of the bug?
One second after the bug starts from rest, what are its
(c) tangential acceleration, (d) centripetal accelera-
tion, and (e) total acceleration?
18. An adventurous archeologist (m 85.0 kg) tries
to cross a river by swinging from a vine. The vine is
10.0 m long, and his speed at the bottom of the swing is
8.00 m/s. The archeologist doesn't know that the vine
has a breaking strength of 000 N. Does he make it
across the river without falling in?
cord is fixed and
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