Question

A turntable rotates with a constant 2.25 rad/s2 angular acceleration. After 4.50 s it has rotated through an angle of 30.0 rad.

1- What was the angular velocity of the wheel at the beginning of the 4.50-s interval?

Answer 1

Initial angular speed of the turntable =

Angular acceleration of the turntable = = 2.25 rad/s2

Angle through which the turntable rotates in 4.5 sec = = 30 rad

Time period = T = 4.5 sec

= 1.6 rad/s

1) Angular velocity of the turntable at the beginning of the 4.5 sec interval = 1.6 rad/s