Linear Momentum of a System of Particles
المؤلف:
Professor John W. Norbury
المصدر:
ELEMENTARY MECHANICS & THERMODYNAMICS
الجزء والصفحة:
p 115
28-12-2016
3129
Linear Momentum of a System of Particles
The total momentum 
of a system of particles is just the sum of the momenta of each individual particle, namely
Now from the previous example we had 
, giving the total momentum of a system of particles as
which is a very nice handy formula for the total momentum equals total mass multiplied by the velocity of the center of mass. Taking the time derivative gives 
assuming that M is constant. Thus Newton's second law for a system of particles can be written
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