Question Detail

PHY 101 Mechanical Equilibrium and Rotational Dynamics Objective Question
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Question

The principle of moments states that for a body in rotational equilibrium, which of the following conditions holds true about a point on the body?
Options
A The sum of clockwise moments equals the product of anticlockwise moments.
B The sum of clockwise and anticlockwise moments is zero.
Correct Answer
C The sum of clockwise moments is always greater than anticlockwise moments.
D The total moment is equal to the net force times the distance.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The principle of moments is a fundamental condition for rotational equilibrium. It states that for a body to have no net tendency to rotate, the total clockwise moment (torque) about any point must be exactly balanced by the total anticlockwise moment (torque) about that same point, meaning their algebraic sum is zero.

Hint

Consider what must be true for the clockwise and anticlockwise turning effects to cancel each other out.

Question Info

Course: PHY 101
Topic: Mechanical Equilibrium and Rotational Dynamics
Type: Objective
Difficulty: Not specified
Question 567 of 1250
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