Question

Sasha Cohen does a triple toe loop (rotating 1080 degrees) in 1.5 s. What is her average angular speed during this jump

360°/s
3.0 rad/s
12.6 rad/s
720 rad/s

Answer 1

9514 1404 393

Answer:

12.6 rad/s

Explanation:

1080 degrees in 1.5 seconds is an angular rate of ...

(1080°)/(1.5 s) = 720 °/s

There are π radians in each 180°, so this angular speed is ...

720 °/s = 4×180 °/s = 4×π rad/s ≈ 12.6 rad/s

Sasha's average angular speed is 12.6 rad/s.