The moment of inertia of a body depends on
- A. its mass only
- B. its mass and how that mass is distributed about the axis of rotation
- C. its angular speed
- D. the torque applied to it
Explanation
Moment of inertia is the sum of each mass element multiplied by the square of its distance from the axis, so moving mass further out increases it sharply even when the total mass is unchanged. This is why a hollow cylinder has a larger moment of inertia than a solid one of the same mass. It plays the same role in rotation that mass plays in linear motion.
Related questions
A wheel rotating at 300 revolutions per minute has an angular speed of about
A body moving in a circle at constant speed
The so-called centrifugal force experienced by a passenger on a turning bus is
The time period T and the angular speed omega of circular motion are related by
A skater spinning with arms outstretched pulls the arms inwards. The result is that