Resulting Velocity of Astronaut/Equipment: 1,960N in 2s

[Makaroon]

Homework Statement

On Earth, an astronaut and equipment weight 1,960.0 N. While weightless inspace, the astronaut fires a 100 N rocket backpack for 2.0 s. What is the resulting velocity of the astronauts and equipment?

Homework Equations

?

The Attempt at a Solution

t=2.0 s
w=mg


i am super lost...
idk which equation to use :S
i only know of
v=d/t :S
please help... i would truly appreciate it...

 

[LowlyPion]

You know the weight, so figure the mass.

You know the force, so figure the acceleration. F = M*a after all.

You know the acceleration, you know the time ... you know the answer.