Question

A discus thrower accelerates a discus from rest to a speed of 25m/s by whirling it at 1.25 rev. The discus moves in circle of radius 1m. Find a. The final angular speed, b. The constant angular acceleration, c. The time interval from rest to the speed 25m/s.

Thanks for the help!

Answer 1

a) omega = v/r
b) alpha = omega^2/2(theta )
where theta = 1.25*2pi
c) t = omega/alpha (since initial is zero)