Saturday 13 December 2014

Newton's Laws of motion

Newton's Laws of Motion 


The great scientist's 3 laws of motions were the major contribution of his in making us see th universe in a completely different way.


Lets now understand,by first knowing what these 3 laws of motion said and then we'll understand it along with experiments.

Newton's First law:-

I. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

Newton's Second law:-


II. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Acceleration and force are vectors (as indicated by their symbols being displayed in slant bold font); in this law the direction of the force vector is the same as the direction of the acceleration vector

Newton's third law:-

III. For every action there is an equal and opposite reaction.

Explanations:-



Newton's First law:-
  1. An object that is at rest will stay at rest unless an external force acts upon it. An object that is in motion will not change its velocity unless an external force acts upon it.

  2. To understand this better watch the following experiment carefully.


Newton's Second law:-
  1. Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

    1. To understand this better watch the following experiment carefully.
  2. Newton's Third law:-
    1. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object.
      1. To understand this better watch the following experiment carefully.