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Mastering CH 8:

Angular Motion

Physics 121

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Chapter 8

7. (II) (a) A grinding wheel 0.35 m in diameter rotates at 2200 rpm. Calculate its angular velocity in rad/ s. (b) What are the linear speed and acceleration of a point on the

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Chapter 8 J

13. (II) How fast (in rpm) must a centrifuge rotate if a particle 8.0 cm from the axis of rotation is to experience an accel­eration of 100,000 g's?

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Chapter 8

21. (II) A wheel 31 cm in diameter accelerates uniformly from 240 rpm to J6Q rpm in 6.8 s. How far will a point on the -edge of the wheel have traveled in this time?

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firs\~ E NGINEERS ~SSIONALS

Chapter 8

25. (II) Calculate the net torque about the axle of the wheel shown in Fig. 8-42. Assume that a friction torque of 0.60 m · N opposes the motion.

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i-2.s. Calculate the net torque about the axle of the wheel shown in the figure.

Assume that a friction torque of 0.95 m.N opposes the motion.

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