angular velocity of a process control motor is Fad/s". CALC W = (20 – t²) rad/s, where t is in seconds. a. At what time does the motor reverse direction? b. Through what angle does the motor turn between t = 0s and 83 = Os %3D the instant at which it reverses direction? 73. I| A Ferris wheel of radius R speeds up with angular acceleration a starting from rest. Find an expression for the (a) velocity and (b) centripetal acceleration of a rider after the Ferris wheel has rotated through angle A0. 74.Il A 6.0-cm-diameter gear rotates with angular velocity w = CALC (2.0 + t²) rad/s, where t is in seconds. At t = 4.0 s, what are: a. The gear's angular acceleration? b. The tangential acceleration of a tooth on the gear? 75. || A painted tooth on a spinning gear has angular acceleration CALC a = (20 – t) rad/s?, where t is in s. Its initial angular velocity, at t%3D0 s, is 300 rpm. What is the tooth's angular velocity in rpm at t=20 s? 76. III A car starts from rest on a curve with a radius of 120 m and accel- Through what angle will the car have

angular velocity of a process control motor is Fad/s". CALC W = (20 – t²) rad/s, where t is in seconds. a. At what time does the motor reverse direction? b. Through what angle does the motor turn between t = 0s and 83 = Os %3D the instant at which it reverses direction? 73. I| A Ferris wheel of radius R speeds up with angular acceleration a starting from rest. Find an expression for the (a) velocity and (b) centripetal acceleration of a rider after the Ferris wheel has rotated through angle A0. 74.Il A 6.0-cm-diameter gear rotates with angular velocity w = CALC (2.0 + t²) rad/s, where t is in seconds. At t = 4.0 s, what are: a. The gear's angular acceleration? b. The tangential acceleration of a tooth on the gear? 75. || A painted tooth on a spinning gear has angular acceleration CALC a = (20 – t) rad/s?, where t is in s. Its initial angular velocity, at t%3D0 s, is 300 rpm. What is the tooth's angular velocity in rpm at t=20 s? 76. III A car starts from rest on a curve with a radius of 120 m and accel- Through what angle will the car have

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 12CQ: A child is practicing for a BMX race. His speed remains constant as he goes counterclockwise around...

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