Question Detail

PHY 101 PHY 101 Past Questions Objective Question

Question

Which of the following is the correct expression for determining the moment of inertia of a hollow cylinder?
Options
A ½m(R₁² + R₂²)
Correct Answer
B m(R₁² + R₂²)
C ½m(R₁² - R₂²)
D m(R₁² - R₂²)
Correct Answer

Option A is the correct answer.

Detailed Explanation

For a hollow cylinder (thick-walled) rotating about its axis, the moment of inertia is ½m(R₁² + R₂²), where R₁ and R₂ are inner and outer radii.

Hint

Moment of inertia depends on mass distribution.

Question Info