# Rotational Motion questions

## The angular velocity of the earth around the sun increases when it comes closer to the sun. Why?

When the earth comes closer to the sun, the distance of the earth from the sun decreases, and that decreases

## If the earth is struck by meteorites, the earth will slow down slightly. Why?

When the earth is struck by meteorites, the mass of the earth increases which increases the moment of inertia of the earth as

## Why spokes are fitted in the cycle?

Q. Why spokes are fitted in the cycle? The spokes fitted in a cycle increase the moment of inertia of a wheel. From the conservation of angular momentum ( = constant), we can say the greater moment of inertia of a wheel reduces the angular velocity of a wheel proving the smooth rotation of a …

## A circular disk rolls down an inclined plane. The fraction of its total energy associated with its rotational motion is

A circular disk rolls down an inclined plane. The fraction of its total energy associated with its rotational motion is