A student is whirling a ball on a string in a circle with an angular speed of 20 rad/s. Air drag decelerates the ball at a rate of -3 rad/s2. What is the angular speed of the ball after it has spun through an angle of 30 radians? Remember to include units with your answer.
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A student is whirling a ball on a string in a circle with an angular speed of 20 rad/s. Air drag decelerates the ball at a rate of -3 rad/s2. What is the angular speed of the ball after it has spun through an angle of 30 radians? Remember to include units with your answer.
A disk is initially at rest. If the disk speeds up uniformly to a speed of 45 rad/s in a time of 15 seconds, what angle does it turn through? Remember to include units with your answer.
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- 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 968.7 rad/s while it is being read, and then is allowed to come to rest over 0.301 seconds, what is the magnitude of the average spun at angular acceleration of the disk? average angular acceleration: 3278.07 rad s2 If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/7 of the way out from the center of the disk? 26.22 tangential acceleration: IncorrectThe 4.00-cm-long second hand on a watch rotates smoothly. What is its angular speed? Express your answer in radians per second to three significant figures. What is the speed of the tip of the hand?A wheel, initially rotating at 15.4 rad/s, undergoes an angular acceleration of 5.5 rad/s^2. What is the angular velocity when the wheel has turned through an angle of 69.0 rad? Give your answer in rad/s.
- Two bugs, Buzz and Crunchy, are siting on a spinning disk. Buzz is sitting halfway and Crunchy is sitting at the outer edge as shown. The radius of the disk is 1.6 m and the disk is rotating with an angular speed of 33 rpm. What is Crunchy's speed, in m/s?A figure skater performs a twisting jump. She rotates around her longitudinal axis 2 times in 0.65 s. What was her average angular velocity in radians/second? A 720rad/s B 19.3rad/s C 4? rad/s D 9.67 rad/s E 1107 rad/sA child is riding a merry-go-round which completes one revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the child's angular velocity? .603 rad/s .651 rad/s .751 rad/s .851 rad /s 2.134 rad/s
- A child is riding a merry-go-round, which has an angular speed of 2.15 rad/s and an angular acceleration of 0.85 rad/s2 . The child is standing 3.465 m from the center of the merry-go-round. What is the magnitude of the acceleration of the child?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 910.0 rad/s while it is being read, and then is allowed to come to rest over 0.301 seconds, what is the magnitude of the average angular acceleration of the disk? rad average angular acceleration: s2 If the disk is 0.12 m in diameter, what is the magnitude of the tangential acceleration of a point 1/8 of the way out from the center of the disk? m tangential acceleration:Starting from rest, a wheel with a radius of 0.55 m begins to roll across the ground in a straight line under a constant angular acceleration of 4.05 rad/s2. What is the speed of the wheel in m/s after it has rotated through 17 full revolutions
- A crankshaft rotating at 10.2 rad/s undergoes an angular acceleration of 2.2 rad/s^2. What is the angular velocity of the shaft after 11.0 s? Give your answer in rad/s.A flywheel slows from 517.7 rev/min down to 364.9 rev/min while spinning through 44.4 revolutions. What is the angular acceleration of the flywheel (in rad/s/s)? Assume that the flywheel slows down at a constant rate.June started winding up her arm holding a baseball, moving it around her shoulder in a circle, to get ready to throw. June’s arm is 0.5 m long and moves at an angular velocity of 2 rad/s. How much time will 10 revolutions take? What is the velocity of the baseball when she let go of it?