Question: What is the moment of inertia for a solid cylinder rotating about its central axis?

Options:

1. 1/2 m r²
2. m r²
3. 2/5 m r²
4. 1/3 m r²

Correct Answer: 1/2 m r²

Solution:

The moment of inertia for a solid cylinder rotating about its central axis is given by I = 1/2 m r², where m is mass and r is radius.