Finding the Total Momentum of a Three Particle System

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SUMMARY

The total momentum of a three-particle system can be calculated by summing the individual momenta of each particle, defined by the equation p = m * v. For the particles given, m1 = 5kg with v1 = (-6, 6, 7) m/s, m2 = 7kg with v2 = (8, -6, -7) m/s, and m3 = 1kg with v3 = (6, 7, 13) m/s, the total momentum is derived from the vector sum of their momenta. The center of mass velocity can be determined by dividing the total momentum by the total mass of the system, which is 13kg.

PREREQUISITES
  • Understanding of momentum calculation using p = m * v
  • Familiarity with vector addition in physics
  • Basic knowledge of mass and velocity units (kg and m/s)
  • Concept of center of mass in multi-particle systems
NEXT STEPS
  • Calculate the total momentum for different particle configurations
  • Learn about the center of mass and its significance in physics
  • Explore vector addition techniques in physics problems
  • Study the implications of momentum conservation in isolated systems
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Students studying physics, particularly those focusing on mechanics and momentum, as well as educators looking for examples of multi-particle systems in motion.

Westin
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Homework Statement



Consider a system consisting of three particles:

m1=5kg, v1=
char68.png
-6,6,7
char69.png
m
char3D.png
s

m2=7kg, v2=
char68.png
8,-6,-7
char69.png
m
char3D.png
s

m3=1kg, v3=
char68.png
6,7,13
char69.png
m
char3D.png
s

What is the total momentum of this system?

What is the velocity of the center of mass of this system?[/B]

Homework Equations



p=m*v

The Attempt at a Solution



I tried (m1+m2)(v1+v2) + (m2+m3)(v2+v3)
and (m1+m2+m3)(v1+v2+v3), neither were correct...
 
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To find the momentum of the system of particles, add the momentums of each of the particles. The momentum of each particle is the mass of each particle multiplied by each particle's respective velocity.
Westin said:
I tried (m1+m2)(v1+v2) + (m2+m3)(v2+v3)
Foiling the first two factors produces m1v1 + m2v2 + m1v2 + m2v1. Why would you multiply the mass of one of the particles by the velocity of another particle? How could this result be meaningful?
 

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