Question
A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then
A grindstone of radius 4.0 m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over the next 4.0 seconds. Assume that the angular acceleration is constant. What is the average angular speed of the grindstone?
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Koala Tutor
Koala Ai Support
Got a question with my answer?
The average angular speed is the average of the initial and final angular speeds.
Average angular speed = (Initial angular speed + Final angular speed) / 2
= (8.0 rad/s + 12 rad/s) / 2
= 20.0 rad/s / 2
= 10.0 rad/s.
So, the average angular speed of the grindstone is 10.0 rad/s.
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