# Major difference of Inertial and non-inertial frame of reference ?

 P: 11 What is the major difference or differences of Inertial and non-Inertial frame of reference?? Is it only: Inertial - Constant velocity, obeys the law of inertia Non-inertial - Acceleration, disobeys the law of inertia
 Emeritus Sci Advisor PF Gold P: 5,597 The important thing to realize is that the term is defined in a completely different way in Newtonian mechanics than in GR. Jamesfirst's OP is a decent working definition according to Newtonian mechanics.
P: 88
Major difference of Inertial and non-inertial frame of reference ?

 Quote by jamesfirst What is the major difference or differences of Inertial and non-Inertial frame of reference?? Is it only: Inertial - Constant velocity, obeys the law of inertia Non-inertial - Acceleration, disobeys the law of inertia
there is difference and there is another difference.but there is no such thing as major difference (unless u define it).

so inertial frame
consider an object with mass m which is acted by fundamental force (i.e. gravitational or electric.) f.
now frame s would be inertial if
acceleration between the object and the frame = f/m.

if a frame dont satisfy the above equation then its a non inertial frame.

now if there are more objects then a inertial frame has to satisfy the equation for every object.

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