Question

What is inertia and momentum??

Answer 1

Inertia is the tendency of an object in motion to remain in motion, or an object at rest to remain at rest, unless acted upon by a force.
It is inversely proportional to mass.
The momentum of a particle is defined as the product of its mass times its velocity. It is a vector quantity.
p=mv
Its SI unit is: kg m/s.

Answer 2

The property of an object by virtue of which it neither changes it's state nor it tends to change the state, is called inertia. It is an inherent property of all object.
The product of mass and velocity of a body is called momentum or Linear momentum. SI unit of momentum is kg m/s