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Transcript
```9-9 Center of Mass and Translational Motion
The total momentum of a system of particles is
equal to the product of the total mass and the
velocity of the center of mass.
The sum of all the forces acting on a system is
equal to the total mass of the system multiplied
by the acceleration of the center of mass:
Therefore, the center of mass of a system of
particles (or objects) with total mass M
moves like a single particle of mass M acted
upon by the same net external force.
```
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