9.29. As in the case of translational motion, suppose the frictional torque is proportional to the...
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9.29. As in the case of translational motion, suppose the frictional torque is proportional to the angular velocity, that is, 7, = - k0, while the driving torque is T = 7,(1 + a cos w). Find the steady-state motion. 9.30. Consider a motor with an armature of 2-kg mass and radius of gyration of 8 cm. Its no-lcad full speed is when it draws a current of 2 A at 110 V at 1600 rpm. If the frictional torque is proportional to the angular velocity and the electrical efficiency is 75%, calculate the time required to reach a speed of 1200 rpm with no load. 931 A bome 9.29. As in the case of translational motion, suppose the frictional torque is proportional to the angular velocity, that is, 7, = - k0, while the driving torque is T = 7,(1 + a cos w). Find the steady-state motion. 9.30. Consider a motor with an armature of 2-kg mass and radius of gyration of 8 cm. Its no-lcad full speed is when it draws a current of 2 A at 110 V at 1600 rpm. If the frictional torque is proportional to the angular velocity and the electrical efficiency is 75%, calculate the time required to reach a speed of 1200 rpm with no load. 931 A bome
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Probability and Statistics for Engineering and the Sciences
ISBN: 978-1305251809
9th edition
Authors: Jay L. Devore
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