Answered: BB-8 is an intergalactic robot that is…

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotation Of A Rigid Object About A Fixed Axis

Section: Chapter Questions

Problem 15P: A grinding wheel is in the form of a uniform solid disk of radius 7.00 cm and mass 2.00 kg. It...

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5. BB-8 is an intergalactic robot that is trying out for a new role in the rebellion. The main portion of his body is a sphere of radius half a meter. One competition tests how quickly entrants can travel 250 m. They must start from rest and end at rest. BB-8 has a maximum angular acceleration rate of 1.9 rad/s?, both when speeding up and slowing down. (a) What is the corresponding torque on BB-8's solid spherical body, assuming it has a mass of 4.6 kg? (b) What is the minimum time in which BB-8 can run the trial? (c) What is the maximum number of revolutions per minute BB-8 obtains in this competition?

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

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