State whether the following statement is True or False:
The inertia of an object depends upon its mass.

How does the safety belt in a car help when a moving car applies brakes suddenly?

Can there be displacement of an object in the absence of any force acting on it?

State and explain the law of inertia (or Newton's first law of motion).

Write answers to the following:
$(i)$ Mention the direction in which the force of friction acts on a moving body. State its units.
$(ii)$ Name the property of bodies (or objects) to resist a change in their state of rest or of motion. Name the quantity that is a measure of this property.
$(iii)$ Name the physical quantity whose unit is $kg\, m s^{-1}$. Define this quantity.

Inertia is that property of a body by virtue of which the body is