I understand that we can write the 4-force in terms of the vector force based on velocity, and the energy of the system in general.(adsbygoogle = window.adsbygoogle || []).push({});

What I don't understand is what this gains for us, and why we use it. Also correct me if I am incorrect in my definition above.. I don't have my book infront of me.

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# Can someone explain the 4-force to me.

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