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**1.Two particles lie on an x axis, particle 1 at x = 1 m and particle 2 at x = 2 m. If you gradually increase the mass of particle 1, what happens to the center of mass of the two-particle system?**

2.If an external force acts on a system of several objects, can the external force change the net momentum of the system?

2.If an external force acts on a system of several objects, can the external force change the net momentum of the system?

## Homework Equations

((m2)/(m1+m2))d

## The Attempt at a Solution

I'm not sure for the first question if it moves in the negative or positive direction of x or if it does not move at all..

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