three identical particles lie in x y plane. The (x, y) coordinates of their positions are (3, 2), (1.1) and (5.3), respectively. The (x, y) coordinates of the centre of mass are

three identical particles lie in x y plane. The (x, y) coordinates of

1.	three identical particles lie in x y plane. The (x, y) coordinates of their positions are (3, 2), (1.1) and (5.3), respectively. The (x, y) coordinates of the centre of mass are
Answer» (1,2) (a,B) (3,2) (2,1) Solution :The X and Y COORDINATES of the centre of MASS are `X=(m_(1)X_(1)+m_(2)X_(2)+m_(3)X_(3))/(m_(1)+m_(2)+m_(3))=(1)/(3)(X_(1)+X_(2)+X_(3))=(1)/(3)(3+1+5)=3` `Y=(1)/(3)(2+1+3)=2`