A rotating wheel accelerates uniformly at 6.2 rad/s, and completes 25 revolutions during a 5.0 s interval.
(a) What is the angular velocity of the wheel
At the start of the 5.0 s interval?
(b) What is the angular velocity of the wheel at
The end of the 5.0 s interval?

1. Find the angle in rad for 25 revolutions.

Use s = ut+ \frac 12 at^2 to find the initial speed, u.

2. Use v = u +at You know the time t, the initial velocity u and the acceleration a.