Finding Final Velocity of Skaters

[goldgirl778]

Homework Statement

During an ice show, a 60.0 kg skater leaps into the air and is caught by an intially stationary 75.0 kg skater.

Homework Equations

What is their final velocity assuming negligible friction and that the 60.0 kg skater's original horiziontal velocity is 4.00 m/s?

How much kinetic energy is lost?

The Attempt at a Solution

I need an equation for the final velocity calculation.

 

[Hollumber]

Look up conservation of momentum