Rotational Kinematics of Disk · PhysicsBowl 2017 #18

Physics · mechanics

Problem

A disk of radius 75.0 cm makes 3.5 revolutions when coming to rest in 2.50 s. What was the initial angular speed of the disk? (A)

1.40 \frac{rad}{s}

(B)

6.60 \frac{rad}{s}

(C)

8.80 \frac{rad}{s}

(D)

13.2 \frac{rad}{s}

(E)

17.6 \frac{rad}{s}