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## Homework Statement

A 10-kg mass moving at a speed of V[tex]_{1}[/tex] in a positive direction collides elastically with a 2-kg mass which is initially at rest. The magnitude of the net force that acts on each object during the collision is shown in the figure. Find the initial velocity, V[tex]_{1}[/tex], of the 10-kg mass prior to collision, the final velocity, v[tex]_{3}[/tex], of the 10-kg mass, and the final velocity, v[tex]_{4}[/tex], of the 2-kg mass.

I can't post the figure up, but it's a force with respect to time chart. It starts with nothing, then starts to spike upwards at a constant rate from time 1 millisecond to time 3 milliseconds, where it peaks at 10000N, then goes back down at the same rate, hitting 0N at 5 milliseconds. I've already figured the Impulse is 20 N*s from this.

## Homework Equations

p = mv

I = F[tex]/delta[/tex]T

[tex]/delta[/tex]p = mv[tex]_{final}[/tex] - mv[tex]_{initial}[/tex]

mv[tex]_{before collision}[/tex] = the some of mv[tex]_{after collision}[/tex]

Possibly assorted others.

## The Attempt at a Solution

So far, I know the Impulse is 20 NS.

Impulse = Momentum, I do believe.

So

20 = (10)V

Making Velocity of the first object initially = 2 m/s, correct?

That would answer the first question, but I'm not totally sure where to go from there.