I am looking at the classic paper Israel and Khan "Collinear Particles and Bondi Dipoles in General Relativity"(adsbygoogle = window.adsbygoogle || []).push({});

Nuovo Cimento 33 (1964) 331.

The basic question is how to go from equation 2.9 to 2.10?

a_i is the center of rod i and b_i is the mass of rod i.

The attached file has the details.

Thanks!

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# Israel Khan derivation step

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