Question

A fly wheel has a speed of 300 r.p.m.

1 what is it angular velocity

2. What angle will be generated in 0.2 second

3 what much time is required for the wheel to rotate through 628 radians

Answer 1

1.

$$\omega=2\pi n\\ =2*3.14*300*1/60=31.4\:\rm rad/ s$$

2.

$$\theta=\omega t\\ =31.4*0.2=6.28\:\rm rad=360^\circ$$

3.

$$t=\theta/\omega\\ =628/31.4=20\:\rm s$$