
Concept explainers

Answer to Problem 7PP
Angular velocity is ,
Explanation of Solution
Given :
Angular speed,
Moment of inertia,
Time interval,
Formula used:
Angular velocity is given as
Here,
First equation of motion (rotational).
Here,
Also,
Here,
Calculation:
Now, substitute the value of Nin equation (1).
As the ball starts motion from rest. Therefore, initial angular speed of ball,
Substitute the value of
Now, substitute the value of Iand
Conclusion:
Therefore, angular velocity of ball thrown is 62.8 rad/s and average torque is
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