Two masses of 0.4 kg and 0.6 kg are lying in the x-y plane at the locations, whose coordinates are (1,-2) and (-3,4) respectively. Find the coordinates of the centre of mass of the system.
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COM = (m1x1+m2x2)/m1+m2, (m1y1+m2y2)/m1+m2
=(0.4×1+0.6×-3)/0.4+0.6, (0.4×-2+0.6×4)/0.4+0.6
=0.4-1.8/1, -0.8+2.4/1
= -1.4,1.6
Therefore COM = -1.4,1.6
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