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## Homework Statement

Walt and Wolfie collide in bumper cars of mass 50 kg each. Walt has a mass of 78 kg, and Wolfie has a mass of 61 kg. Walt strikes Wolfie from the rear at V = 3.7 m/s. If the collision is elastic, Wolfie is initially at rest, and Walt's final speed is 0.2655 m/s in the same direction, what is Wolfie's speed after the collision?

## Homework Equations

m1*(u1^2)/2 = m1*(v1^2)/2 + m2*(v2^2)/2

## The Attempt at a Solution

78*(3.7^2)/2 = 78*(0.2655^2)/2 + 61*(x^2)/2

and I get 4.17 m/s, but that doesn't seem right to me.

Can anyone shed some light on this for me?