Transcription of 1 12. Rolling, Torque, and Angular Momentum
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1 12. Rolling, Torque, and Angular Momentum
112. Rolling, Torque, and Angular MomentumRolling Motion: A motion that is a combination of rotationaland translational motion, a wheel rollingdown the road. Will only consider rolling with out a disk or sphere rolling along a horizontalsurface, the motion can be considered in twoways: of rotational and translationalmotion: Center of mass moves in a translationalmotion. The rest of the body is rotating around thecenter of cmvvcmfifi II. Pure Rotational Motion:2 The whole object is revolving around apoint on the object in contact with thesurface.
• The speed at the bottom does not depend on the radius or the mass of the disk. • The speed at the bottom is less than when the disk slides down a frictionless ramp: v = 2 gh • The angular speed depends on the radius but not the mass. • We can still apply conservation of energy even though there is a friction force. The
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