4 point masses are placed at corners of a square of side 2m as shown.find centre of mass of system w.r.t. the square.

Let O is the centre of the square.A,B,C,D are the corners of the square.A = 1kgB= 2kgC = 3 kgD = 4 kgA HAVE COORDINATES = (1,1)B has cordinates = (−1,1)C = (−1,−1)D = (1,−1)as we are moving in anti−clockwise directionX coordinated of the centre fo mass:Xcm = m1x1+m2x2+m3x3+m4x4m1+m2+m3+m4Xcm = 1−2−3+41+2+3+4 = 0Y coordinate of the centre of mass:Ycm = m1y1+m2y2+m3y3+m4y4m1+m2+m3+m4Ycm = 1+2−3−41+2+3+4 = −0.4cordinates of centre of mass with respect to origin = (0, −0.4)