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

1. Oct 29, 2010

### jamesfirst

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

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

2. Oct 30, 2010

### ghwellsjr

Re: Major difference of Inertial and non-inertial frame of reference ??

3. Oct 30, 2010

### bcrowell

Staff Emeritus
Re: Major difference of Inertial and non-inertial frame of reference ??

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.

4. Nov 15, 2010

### ManishR

Re: Major difference of Inertial and non-inertial frame of reference ??

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.