Physics



Newton's Laws



First law 


 Every body remains in a state of rest or uniform motion in a straight line unless acted upon by forces from outside . The tendency of an object to remain moving in a straight line at constant speed or to remain stationary is called Inertia.


 Second law 

The amount of acceleration of a body is proportional to the acting force and inversely proportional to the mass of the body. Newton (N) : If a force acting on a body of mass 1 kg produces an acceleration of 1m/s2 in it , the force is called one newton. Resultant Force (N) = mass (Kg) x acceleration (m/s2) F = ma 



Third law 

To every action there is an equal but opposite reaction. If an object A exerts a force on object B , then object B will exert an equal but opposite force on object A





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