PHY 1420 Midterm: Test 3 Notes
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Degree (cid:2869)8(cid:2868) radians (cid:2869)8(cid:2868) degree. The average angular velocity is defined as the total angular displacement divided by time. If angular velocity is constant, then uniform circular motion. Uniform circular motion: angular acceleration is zero. All points in a rigid object rotate with the same angular velocity, since every position in the object moves through the same angle in the same time interval. Objects farther from the axis of rotation will move faster. Person running on the outer edge and inner part. Same angle and same time period, so the outer person has to run with a greater speed. In uniform circular motion, radial acceleration and centripetal acceleration are the same. The frequency is the number of complete revolutions per second: Frequency, f, -- the number of revolutions per second. Period t -- the time required for one complete revolution. 1hz=(cid:883)(cid:1871) (cid:2869) fingers curl towards rotational motion, thumb points toward angular velocity.