Rotational Probs

# Rotational Probs - 3 rad/s How long before they meet 6 A...

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PROBLEMS FOR ROTATIONAL MOTION 1. A diver completes 3 1/2 somersaults 11.7 s. What is the average angular speed of the diver? 2. A CD has a playing time of 74 minutes. When the music starts, the CD is rotating at angular speed of 480 revolutions per minute. At the end of the music, the CD is rotating at 210 rpm. What is the magnitude of the average angular velocity of the CD? 3. An electrical circular saw is designed to reach its final angular speed, starting from rest in 1.50 s. Its average angular acceleration is 328 rad/sec*sec . What is its final angular speed? 4. An electrical fan is running on HIGH. After the LOW button is pressed, the angular speed of the fan decreases to 83.8 rad/s in 17.5 s. The deceleration of the fan is 42 rad/s*s. What was the initial angular speed of the fan? 5. Two people start at the same place and walk around a circular path in opposite directions. One has an angular speed of 1.7 x 10 - 3 rad/s, while the other has an angular speed of 3.4 x 10 -
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