Double cheking momentum problem

[Jbreezy]

Homework Statement

A bullet of mass 0.21 kg is fired from a gun of mass 5.6 kg. If the guns recoil speed is 2.5 m/s, what speed must the bullet have as it leaves the gun?

Homework Equations

m1V2 + m2v2ii = m1v1i + m2v2i
m1 = gun, m2 = bullett

The Attempt at a Solution

So,
The terms on the right side drop out.
m1V2 + m2v2ii = m1v1i + m2v2i
m1V2 + m2v2ii = 0
m1V2 = -m2v2ii
divide by m2
m1V2/-m2 = v2ii

(5.6 kg x 2.5 m/s) / (0.21 kg)
-66.6
Since it asks for speed 66.6 m/s
Is this correct I don't have a solution guide thanks.

 

[barryj]

yep yep

 

[Jbreezy]

thx dude