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## Homework Statement

Car A, having a mass of 1.30 x 10+3kg is traveling at 60.0 km/h due east when it collides with car B, having a mass of mass 1.70 x 10+3kg traveling at 40.0 km/h due west. If the collision is totally inelastic, find the final velocity of car B.

.

## Homework Equations

I'm using the equation

*m*1

*v*⃗ 1+

*m*2

*v*⃗ 2=(

*m*1+

*m*2)

*v*⃗

*f*

## The Attempt at a Solution

I'm getting 146,000 = (3000)Vf which I'm then dividing to get a velocity of 48.66. But the answer key is telling me 3.33km/h due east. I haven't taken physics in years and am super rusty so any help would be much appreciated.