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A body has its centre of mass at the origin. The y coordinates of the particles of the body may be 1) all positive 2) all negative 3) all non-zero 4) positive for some cases and negative in other cases. Which of the following is correct ?

\[\begin {array} {1 1} (a)\;1\; and\; 2 \\ (b)\;2\;and\;3 \\ (c)\;2\;and\;4 \\ (d)\;3\;and \;4 \end {array}\]

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The y coordinates of the particles of the body may be all non zero and positive for some cases and negative in other cases.
correct option is 3 and 4
answered Nov 20, 2013 by meena.p
 

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