Momentum. resulting velocity. Rocket

[rtamplain]

[SOLVED] Momentum. resulting velocity. Rocket

Homework Statement

On earth, an astronaut and equipment weigh 1,960.0 N. While weightless in space, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronaut and equipment?

I have to be missing something. I tried using every formula given to me in class and I cannot get anywhere. Please help. Thanks.

Homework Equations

p=mv
Ft= (mf)(vf)-(mi)(vi)
Ft=ma+v(difference of m/t)
m1v1=m2v2

The Attempt at a Solution

I tried a few and can't get a relevant answer. I really do not know where to begin with the rocket.

 

[G01]

Don't worry about the rocket itself. You only care about what it does. It applies a constant force over a specified time? How does this affect the astronaut in terms of momentum?

 

[rtamplain]

difference of momentum= (100N)(2.0s) = 200kgm/s

200kgm/s= (1960N/ 9.8m/s^2) V

V=1m/s

I first found the difference of momentum which is force * time. then used the equation momentum=mass*velocity. Is this correct?

 

[G01]

difference of momentum= (100N)(2.0s) = 200kgm/s

200kgm/s= (1960N/ 9.8m/s^2) V

V=1m/s

I first found the difference of momentum which is force * time. then used the equation momentum=mass*velocity. Is this correct?

Looks Good!