Question

Define momentum. Write its S.I. unit. Define the term inertia. Write the examples of each inertia and momentum. State Newton's first law of motion and give two examples. State Newton’s second law of motion and give two examples. Write formulation of the second law of motion and give examples.

Answer 1

Hint :Answer every part separately, first define the momentum and its SI unit is found by the formula only, while the inertia and other terms are defined by the conceptual knowledge of physics that you have. The example can be very easily taken from the day to day life.
 $ p = m \times v $
 $ F = \dfrac{{dp}}{{dt}} = ma $

Complete Step By Step Answer:
The product of the mass and the velocity of a particle is defined as the momentum. It is given by the formula $ p = m \times v $ . For example a bowling ball (large mass) moving very slowly has the same momentum as a baseball (small mass) moving very fast.
Where $ m $ is the mass of the particle and $ v $ is the velocity of the particle.
The S.I. unit of the momentum is $ Kgm{s^{ - 1}} $
The term inertia is defined as the resistance of any physical object to any change in position, velocity or configuration.
For example, if you make a ball roll, it will have inertia to stop or it will continue rolling unless friction or any other force is applied.
Newton’s first law of motion states that “A body will continue to be in state of rest or uniform motion unless a force is applied on it”
For example: Motion of a ball flowing down the atmosphere
Rocket being launched up in the atmosphere.
According to Newton’s second law of motion:
 $ F = \dfrac{{dp}}{{dt}} = ma $
Where, $ F = $ force on the body
 $ \dfrac{{dp}}{{dt}} = $ change of momentum of the body
 $ m = $ mass of body
 $ a = $ acceleration of the body
For example: Riding your bicycle.

Note :
The answer to each part of the question is somehow related to the factor force that is applied on a body, the first law of motion gives the origin and the necessity of the force while the second law of motion gives us the magnitude of the force and the factors on which it depends.