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## 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.