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Textbook Notes for Rotational Motion Phys 101 Ragan

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PHYS 101
Kenneth Ragan

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Rotational motion: # of radians: Theta = arclength/radius 360 degrees = 2pi radians Angular velocity and acceleration Angular displacement = theta – 2heta 1 Angular velocity = delta theta/delta time rad/s All pts rotate with same angular velocity b/c move through same angle in same time interval + or – for CW or CCW Angular acceleration = delta angular velocity/ delta t rad/s^2 A accel is same for all pts as well Each pt on circle has linear velocity and linear acceleration related to angular quantities as: V = delta l/ delta t = r*angular velocity --- v = rw Angular velocity is same for every point but LINEAR velocity is greater for pts farther from axis of rotation (larger r) atan= r*aangular atotal sum of angular and tangential accelerations ar= r*w^2 TABLE 8-1 SUMMARY Frequency = w/(2pi) Rolling without slipping: v = rw Torque: Rotating around axis requires force Place of force applied matters (perpendicular distance from axis ofroati
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