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![[Post New]](/templates/default/images/icon_minipost_new.gif) 7 Apr 2008 22:39:37 IST
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Inertial frame of reference:
An inertial frame of reference, or inertial reference frame, is one in which Newton's first and second laws of motion are valid. Newton's laws are valid in any reference frame that is neither rotating nor accelerating or expending energy in any kind of mathematical plane.
Eg. u r watching an athlete running on the tracks and u r seated in the stadium.
Non-inertial frame of reference:
In theoretical physics, an accelerated reference frame is usually a coordinate system or frame of reference, that undergoes a constant and continual change in velocity over time as judged from an inertial frame.
Eg. U r running with a person.
Pseudo force:
It is a fictitious or imaginary force whose existance has to be taken for granted if Newton's laws of motion are to hold true in a non-inertial frame of reference.
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