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Four bodies of masses 1,2,3,4 kg respectively are placed at the comers of a square of side ‘a’. Coordinates of centre of mass are (take 1kg at the origion, 2kg on X-axis and 4kg on Y-axis)

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a

7a10,a2

b

a2,7a10

c

a2,3a10

d

7a10,3a2

answer is B.

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Detailed Solution

xcm=m1x1+m2x2m1+m2;ycm=m1y1+m2y2m1+m2

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Four bodies of masses 1,2,3,4 kg respectively are placed at the comers of a square of side ‘a’. Coordinates of centre of mass are (take 1kg at the origion, 2kg on X-axis and 4kg on Y-axis)