pls tel the point of cg in this system and also show the derivation of the formula used, pls!!!!!

Dear Shivam,

Let O be the origin of a coordinate system. Let there be 'n' masses.

centre of mass=(m1r1+m2r2+m3r3+...m_ny_n)/(m1+m2+m3+...m_n). ri is position vector of mass mi.

Let us assume that centre of 1kg sphere is O

centre of mass of system=(0*1+1*2+2*3+3*4)/(1+2+3+4)=20/10=2metre

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