Solid disk at rest starts to spin. The angular acceleration is constant. After 3 revolutions the wheel is spinning at 6radsec. Find the linear velocity andacceleration of a point on the disk 1.2 meters away from the center (axis) at20 seconds.

Explanation:

Given,

Angular displacement, θ = 3 rev

                                         = 3 x 2π = 6π

initial angular speed, ω = 0 rad/s

Angular speed when disk is revolved to 3 revolution = 6 rad/s

radius, r = 1.2 m

time, t = 20 s

Calculating angular acceleration

Acceleration of the disk

Now for linear velocity calculation

Linear velocity,

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