Question Detail

PHY 101 Mechanical Equilibrium and Rotational Dynamics Objective Question
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Question

What does the law of conservation of angular momentum state?
Options
A The angular momentum of a body is always constant.
B The angular momentum of a body is conserved only if its moment of inertia is constant.
C If the sum of external torques acting on a body is zero, its angular momentum is conserved.
Correct Answer
D Angular momentum is conserved only if the body is rotating at a constant angular velocity.
Correct Answer

Option C is the correct answer.

Detailed Explanation

The conservation of angular momentum is a fundamental principle. It states that the total angular momentum of a system remains constant (is conserved) if the net external torque acting on the system is zero.

Hint

Think about the condition required for a quantity to be conserved—it must not be changed by external influences.

Question Info

Course: PHY 101
Topic: Mechanical Equilibrium and Rotational Dynamics
Type: Objective
Difficulty: Not specified
Question 580 of 1250
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