# Homework Help: Conservation of Momentum homework help

1. Nov 23, 2009

### court2011

1. The problem statement, all variables and given/known data
A 93 kg astronaut and a 1500 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.16 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. What was the initial distance from the shuttle to the astronaut?

2. Relevant equations
$$\sum$$F= $$\Delta$$p/$$\Delta$$t

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Nov 23, 2009

### XanziBar

You can use the conservation of momentum Pi=Pf when there are no external forces to find the velocity of the astronaut. Then use speed=distance/time to find the distance.