Question

A body's tendency to resist angular acceleration is called _________.
1. Torque
2. Moment of Inertia
3. Angular momentum
4. None of the above

Answer 1

Correct Answer - Option 2 : Moment of Inertia

CONCEPT:

• Moment of Inertia: A quantity expressing a body's tendency to resist angular acceleration is called the moment of Inertia.
• For point mass Moment of inertia is simply the mass times the square of the perpendicular distance to the axis of rotation.

I = m × r​2 

where I is the Moment of Inertia, m is point mass, r is the perpendicular distance from the axis of rotation.​

EXPLANATION:

• The moment of inertia is a property of the body which resists angular acceleration or its tendency to rotate.
• It is the same as inertia in linear motion.
• The body which shows more tendency to rotate has more moment of inertia.
• Hence the correct answer is option 2.