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Dec 31, 2020 at 1:18 comment added garyp Newton's Laws hold only when the mass is constant. The second is not more general in the sense of this question. But it is more general in the sense that it works in both Newtonian physics and special relativity.
Mar 28, 2014 at 11:51 vote accept Gaurang Tandon
Mar 28, 2014 at 11:43 history answered gj255 CC BY-SA 3.0