# Conservation of momentum astronauts question

1. Oct 30, 2008

### cali_sk8er205

Suppose there are three astronauts outside their spaceship and that two of them decide to play catch with the third. This means the first two astronauts are attempting to throw the third back and forth. All astronauts weigh the same on earth and are equally strong. The first throws the second and the game begins. Describe the motion of the astronauts as the game proceeds. How long will the game last (i.e. how many throws) ?

2. Oct 30, 2008

### Rake-MC

It would help to show what you've tried so far,

We know that momentum is conserved (mass * velocity) within a system. Initially I assume that none of the astronauts are moving. What does this tell you about the motion of the astronauts after the first throw?

3. Oct 31, 2008

### heth

https://www.physicsforums.com/showthread.php?t=268214

(Reposting the same question without showing any work, having been asked to show some work, by the looks of it.)

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