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Physics: Center of Mass of a Red Ball

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See attached graph.

On a graph a red ball has a mass of 2.8 kg and a blue ball of 3.5 kg. The coordinates for the red ball are (2,3) and the blue ball (5,2). To two decimal places what is X Center of Mass? What is Y CM?

The answer for X CM is 3.22, and 2.94 for Y CM. Please show me the steps involved.

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