Virtual Labs

CONSERVATION OF ANGULAR MOMENTUM

Which principle governs the behavior of angular momentum in Experiment 8?

a: Law of Gravitation Explanation

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b: Conservation of Energy Explanation

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c: Conservation of Angular Momentum Explanation

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d: Newton's First Law Explanation

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What is the angular momentum of a rotating body proportional to?

a: Its mass only Explanation

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b: Its radius only Explanation

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c: Its angular velocity only Explanation

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d: Both its mass and angular velocity Explanation

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If there is no net external torque acting on a system, what happens to its angular momentum?

a: It decreases Explanation

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b: It increases Explanation

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c: It remains constant Explanation

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d: It becomes zero Explanation

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How is the moment of inertia of a rotating body defined?

a: The resistance of an object to rotational motion Explanation

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b: The product of mass and velocity Explanation

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c: The product of force and distance Explanation

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d: The product of mass and radius squared Explanation

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Which of the following factors affect the angular momentum of a rotating body?

a: Mass and velocity Explanation

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b: Velocity and radius Explanation

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c: Mass and torque Explanation

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d: Force and distance Explanation

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What is the condition for the conservation of angular momentum in a system?

a: Net torque must be zero Explanation

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b: Net force must be zero Explanation

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c: Net velocity must be constant Explanation

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d: Net kinetic energy must be conserved Explanation

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Which of the following actions might lead to a change in angular momentum?

a: Applying a constant torque Explanation

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b: Increasing the mass of the system Explanation

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c: Reducing the radius of rotation Explanation

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d: Keeping the system isolated from external influences Explanation

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What parameter is typically used to calculate the percentage difference in angular momentum?

a: Moment of inertia Explanation

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b: Initial and final angular velocities Explanation

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c: Length of the rotating body Explanation

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d: Angular acceleration Explanation

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What is the primary purpose of aligning the dropped object over the axis of rotation in Experiment 8?

a: To reduce air resistance Explanation

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b: To minimize friction between the disks Explanation

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c: To ensure accurate measurement of angular velocity Explanation

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d: To balance the system Explanation

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Which of the following statements best describes the conservation of angular momentum?

a: Angular momentum is transferred between objects in a closed system. Explanation

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b: The total angular momentum of a system remains constant if no external torque acts on it. Explanation

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c: Angular momentum increases when the moment of inertia decreases. Explanation

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d: Angular momentum depends only on the mass of the rotating object. Explanation

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In Experiment 8, a base disk with moment of inertia I_base = 0.0125 kg·m² rotates at ω_i = 18.5 rad/s. An annular ring with I_ring = 0.0045 kg·m² is dropped onto it. What is the final angular velocity after collision using conservation of angular momentum?

a: 13.2 rad/s Explanation

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b: 13.6 rad/s Explanation

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c: 14.1 rad/s Explanation

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d: 15.5 rad/s Explanation

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Consider two identical disks with the same angular momentum. Disk A rotates slowly with large moment of inertia, while Disk B rotates quickly with small moment of inertia. Which statement is correct?

a: Disk A has greater angular velocity than Disk B Explanation

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b: Disk B has greater moment of inertia than Disk A Explanation

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c: Disk B has greater angular velocity than Disk A Explanation

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d: Both disks have identical rotational kinetic energy Explanation

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