Two point particles of masses 1kg and 2kg are placed on an axis as shown in figure. The position of COM of the system would be
A
4m from 1kg mass
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B
4m from 2kg mass
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C
At the midpoint between the two masses
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D
Close to 2kg, but data insufficient
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Solution
The correct option is A4m from 1kg mass Given, masses of particles m1=1kg,m2=2kg Taking m1(1kg) to be origin Position of 1kg(x1,y1)=(0,0) Position of 2kg(x2,y2)=(6,0) Position of COM: xcm=m1x1+m2x2m1+m2=1(0)+2(6)3 =4m from m1