O Macmillan LearningAn optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s). If a particular disk is spun at558.2 rad/s while it is being read, and then is allowed to come to rest over 0.234 seconds, what is the magnitude of the averageangular acceleration of the disk?average angular acceleration:If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/3 of the way out from thecenter of the disk?tangential acceleration:rad

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O Macmillan Learning An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s). If a particular disk is spun at 558.2 rad/s while it is being read, and then is allowed to come to rest over 0.234 seconds, what is the magnitude of the ave angular acceleration of the disk? average angular acceleration: If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/3 of the way out from the center of the disk? tangential acceleration:

O Macmillan Learning An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s). If a particular disk is spun at 558.2 rad/s while it is being read, and then is allowed to come to rest over 0.234 seconds, what is the magnitude of the ave angular acceleration of the disk? average angular acceleration: If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/3 of the way out from the center of the disk? tangential acceleration:

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 36P: The angular position of a rod varies as 20.0t2radians from time t=0 . The rod has two beads on it as...

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Keratinocytes are the most common cells in the skins outer layer. As these approximately circular cells migrate across a wound during the healing process, they roll in a way that reduces the frictional forces impeding their motion. (a) Given a cell body diameter of 1.00 105 m (10 m), what minimum angular speed would be required to produce the observed linear speed of 1.67 107 m/s (10 m/min)? (b) How many complete revolutions would be required for the cell to roll a distance of 5.00 103 m? (Because of slipping as the cells roll, averages of observed angular speeds and the number of complete revolutions are about three times these minimum values.)
Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians per second? (b) What is the centripetal acceleration of the skater's nose if it is 0.120 m from the axis of rotation? (c) An exceptional skater named Dick Button was able to spin much faster in the 1950s than anyone since—at about 9 rev/s. What was the centripetal acceleration of the tip of his nose, assuming it is at 0.120 m radius? (d) Comment on the magnitudes of the accelerations found. It is reputed that Button ruptured small blood vessels during his spins.
Suppose a piece of dust has fallen on a CD. If the spin rate of the CD is 500 rpm, and the piece of dust is 4.3 cm from the center, what is the total distance traveled by the dust in 3 minutes? (Ignore accelerations due to getting the CD rotating.)
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