Define inertia of rest and give some examples.
The tendency of a body to remain in its position of rest unless acted by an external force is called ‘inertia of rest’.
Examples:
(i) Dust is removed from a hanging carpet by beating it with a stick. As the carpet is beaten, it suddenly moves forward while the dust particles tend to remain at rest due to inertia and so fall off.
(ii) When we shake a tree, the fruits or dry leaves fall down from the tree due to inertia of rest.