College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- A centrifuge in a medical laboratory rotates at an angular speed of 3,650 rev/min. When switched off, it rotates through 52.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.arrow_forwardIn a large centrifuge used for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates ina horizontal circle. A trainee riding in the chamber of a centrifuge rotating with a constant angular speed of 1.8 rad/s experiences a centripetal acceleration of 2.9 times the acceleration due to gravity. In a second training exercise, the centrifuge speeds up from rest with a constant angular acceleration. When the centrifuge reaches an angular speed of 1.8 rad/s, the trainee experiences a total acceleration equal to 4.7 times the acceleration due to gravity. (a) How long is the arm of the centrifuge? (b) What is the angular acceleration in the second training exercise? (a) (b)arrow_forwardA centrifuge in a medical laboratory rotates at an angular speed of 3,800 rev/min. When switched off, it rotates through 52.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.arrow_forward
- The wheels of a bicycle (radius 40 cm ) have an angular velocity of 17 rad/s before the brakes are applied. In coming to rest, each wheel rotates through an angular displacement of 7 revolutions. Part A How long did it take for the bicycle to come to rest? ΑΣφ ? S Submit Request Answer Part B How far did the bicycle travel while it was stopping? ην ΑΣφ ? m Submit Request Answerarrow_forwardA centrifuge in a medical laboratory rotates at an angular speed of 3,550 rev/min. When switched off, it rotates through 54.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge.arrow_forwardThe period of a stone swung in a horizontal circle on a 2.50-m radius is 1.20 s. (a) What is its angular velocity in rad/s? (b) What is its linear speed in m/s? (c) What is its radial acceleration in m/s2?arrow_forward
- 001 (part 1 of 2) A racing car travels on a circular track of radius 250 m, moving with a constant linear speed of 49.6 m/s. Find its angular speed. Answer in units of rad/s. 002 (part 2 of 2) Find the magnitude of its acceleration. Answer in units of m/s².arrow_forwardAn astronaut is being tested in a centrifuge. The centrifuge has a radius of 12.0 m and, in starting, rotates according to θ = 0.130t2, where t is in seconds and θ is in radians. When t = 2.60 s, what are the magnitudes of the astronaut's (a) angular velocity, (b) linear velocity, (c) tangential acceleration, and (d) radial acceleration?arrow_forwardThe bus's wheels have a radius 26 cm. The bus starts at rest and accelerates at a constant speed until it reaches an angular speed of 10.4 rev/s. During this period, the bus moved 100 m. How many revolutions does the wheel go through?arrow_forward
- An object rotates on a centrifuge at an angular speed of 3 500 rev/min. When the centrifuge is unplugged, it rotates through 45.0 revolutions before coming to a complete stop. Find the constant angular acceleration of the centrifuge.arrow_forwardA child pushes a merry-go-round from rest to a final angular speed of 0.760 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 2.00 revolutions. What is the angular acceleration of the merry-go-round?arrow_forwardA car is on a race track of radius 1200 feet. The car begins moving at 118 ft/s, but accelerates at 12.2 ft/s2 up to its top speed, traveling 2510 feet to do so. What is the angular displacement, angular acceleration and initial angular speed of the car about the track?arrow_forward
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