# Homework Help: Center of Mass coordinates Question

1. Jan 23, 2012

### AJDangles

1. The problem statement, all variables and given/known data

Four masses are connected by 17.4 cm long, massless, rigid rods. If massA=105.0 g, massB=231.0 g, massC=204.0 g, and massD=248.0 g, what are the coordinates of the center of mass if the origin is located at mass A?
See attached picture.

2. Relevant equations

Xc.m = $\sum$Δm x

3. The attempt at a solution

Xc.m = (0*105)+(248*17.4)+(204*17.4)+(231*17.4)/788
=16.24

How do you find the x and y coordinates?

2. Jan 23, 2012

### AJDangles

Here is the picture.

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