Answer to Question #103803 in Mechanics | Relativity for Babar

Question

Justify the following statement"the law of consevation of linear momentim,as applied to a single particle,is equivalent to newton first law of motion"

Answer 1

Newton first law is $\frac{d}{dt}(mv)=F$ where $F$ is a sum external forces acting on particle, $mv$ is a linear momentum. If $F=0$ hence $mv=const$