Question

Center of Mass Problem - what is the correct formula to use ?

Answer 1

How would I go about solving this problem?

Answer 2

tork of weights mast be equal.......

Answer 3

I don't know whether it is correct or not. I got this formula from yahoo answers.
center of mass=(M1P1+M2P2)/(M1+M2)
M=mass of the body and P=position of the body on any axis
in this case,
M1=1kg and M2=3kg
let's consider P1=0 meter and P2= 8 meter
\[(1\times0+3\times8)\div(1+3)\]
i.e. \[\frac{ 24 }{ 4 }\]
=6
Starting prom the 0 position(from 1kg), 6th is position B,
Hence answer is B.

Answer 4

yes that is correct