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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 Jul 2007 19:31:30 IST
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the position of a particle in space is described by 3 or 2 co-ordinates depending on your system with respect to the origin of the systm and IF ANY ONE ALSO OF THESE CO-ORDINATES CHANGE WITH RESPECT TO TIME THEN THEIR IS DISPLACEMENT IIIIIF ONLY ONE CO-ORDINATE CHANGES WID TIME IT IS 1D MOTION EG LINEAR IF 2 CHANGE SIMULTANEOUSLY IT I S 2D MOTION EG PROJECTILE OR CIRCULAR AND SO ON
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