explane Newton's law
Answers
There are 3 Newton's laws of motion.
Newton's first law:
If a body is in the state of rest , it remains to be in state of rest until an external force is applied on it.
Similarly, if a body is in the state of motion, it remains in the state of motion until an external force is applied on it.
This property of an object to remain in its state is called Inertia.
There are two types of inertia
1. Inertia of rest
2. Inertia of motion.
Newton's second law:
According to Newton's second law the force applied on a body is directly proportional to the rate of change in momentum.
We know that
Momentum = mass * velocity
Acceleration = Change in velocity/time
⇒ velocity = acceleration * time
So,
Momentum = mass * acceleration * time
Momentum = Force * time [As F = ma]
Force = Change in momentum/change in time
Newton's third law of motion:
According to Newton's third law, for every action, there will be an equal and opposite reaction.
For example:
If a book is placed on a table, the book exerts some amount of force on the table and the table also exerts the same amount of force on the book keeping the net force 0. So, the book remains in rest.
I hope you understand my explanation and also this helps you.