What is three laws of motion?

Answer 1

Newton's first law is to define force

Second law to measure force

Third law to know about nature of force

What about fourth law? I have not heard about it.

May be your expectation with gravitation

Answer 2

Three fundamental principles which form the basis of classical, or newtonian, mechanics. They are stated as follows:

First law: A particle not subjected to external forces remains at rest or moves with constant speed in a straight line. Second law: The acceleration of a particle is directly proportional to the resultant external force acting on the particle and is inversely proportional to the mass of the particle. Third law: If two particles interact, the force exerted by the first particle on the second particle (called the action force) is equal in magnitude and opposite in direction to the force exerted by the second particle on the first particle (called the reaction force).

Answer 3

Newton's three laws of motion are

1. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
2. The sum of the forces acted upon an object, in newtons, is equal to the mass of the object, in kilograms, times the acceleration of the object, in meters per second squared. Fnet=ma. The force and acceleration vectors must be in the same direction, i.e. if you are trying to find the vertical force, the vertical acceleration must be used instead of the total.
3. For every action, there is an equal and opposite reaction.

Answer 4

This is usually expressed as: force = mass x acceleration.

Answer 5

its stuff like motion and all that junk.