Will the frame be inertial if no forces act on it?

[vissh]

Hello :)
An object is placed far away from all the bodies that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?

Hmm According to me, it should be an Inertial frame as No force acting on it and thus, no acceleration.
What do you think ^.^

 

[Hootenanny]

Hello :)
An object is placed far away from all the bodies that can exert force on it. A frame of reference is constructed by taking the origin and axes fixed in this object. Will the frame be necessarily inertial?

Hmm According to me, it should be an Inertial frame as No force acting on it and thus, no acceleration.
What do you think ^.^

Suppose that the object in question is rotating with constant angular speed?

 

[vissh]

Thanks for reply :)

Suppose that the object in question is rotating with constant angular speed?

Hmmm yep in that case it will get acceleration towards center. But i can't think of an object whose internal forces can make that object Rotate about the object's axis. Can you give me an example or two (^.^)

 

[Hootenanny]

Thanks for reply :)

Hmmm yep in that case it will get acceleration towards center. But i can't think of an object whose internal forces can make that object Rotate about the object's axis. Can you give me an example or two (^.^)

There needn't be any forces making the object rotate. Of course, the object will have some internal stress field, but that isn't important. Suppose you take a ball that is spinning with constant angular speed about its own axis in the absence of any external forces. This example satisfies the conditions in the question. If you were to associate a coordinate system with the ball such that it's origin in at the centre of the ball, the frame would necessarily be non-inertial since it is rotating.

 

[vissh]

:O Got it :)
Thanks nanny ^.^