A rigid disk rotates about a fixed, frictionless axle perpendicular to the disk through its center. External forces exert torques on the disk along its rotational axis, causing its angular momentum \(L\) to vary with time \(t\) as shown in the graph. Which of the following statements correctly describes the net external torque exerted on the disk during the given time intervals? • Nerd Notes

AP Physics 1

6.3 Angular Momentum and Angular Impulse

5.6 Newton’s Second Law in Rotational Form

Multi-Unit

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Angular momentum of the disk as a function of time.

A rigid disk rotates about a fixed, frictionless axle perpendicular to the disk through its center. External forces exert torques on the disk along its rotational axis, causing its angular momentum \(L\) to vary with time \(t\) as shown in the graph.

Which of the following statements correctly describes the net external torque exerted on the disk during the given time intervals?

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