Question

differentiate between mass and inertia with an example ....for class 9

Answer 1

Inertia is tendency to do nothing or to remain unchanged.
mass is a property of a physical body. It is a measure of an object's resistance to acceleration when a force is applied.

Answer 2

Inertia is a property of a body in which it cant move by itself of change the state of rest or motion. example -
-when you open a window
-when you put a pillow on the bed-when you move a cup
-when you put a notebook on the table
Mass is the total amount of inertia present on the body. exapmle -
THE BALL WEIGHS 3 KG ..i.e. the mass of the ball is 3 kg