PHYS 6A Lecture Notes - Lecture 17: Angular Acceleration, Bicycle Wheel, Radian
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Theta = angle measured from reference line. Si unit: radian (rad), which is dimensionless. Take note of chapter 2 and 3 equations. Theta > 0 counterclockwise rotation from reference line. Theta < 0 clockwise rotation from reference line. Si unit: radian per second per second (rad/s^2)=s^-2. Iclicker: a dvd is initially at rest so that the line pq on the disc"s surface is along the +x axis. The disc begins to turn with a constant a=5. 0rad/s^2. Add numbers to replace the letters helps figure out the answer. Iclicker: an object at rest begins to rotate with a constant angular acceleration. Formula that describes the position as a function of time: Theta = 0. 5 rad at t = 1 sec. Theta = 2 rad at t = 2 sec. Iclicker: rabbit a sits on the outer rim of a merry-go-round, and rabbit b sits midway between the center and the rim. The merry-g-round makes one complete revolution every 2 seconds.
