# Rocket Racer on Track#

A rocket racer toy of mass $$m = {{ params.m }} kg$$ is sent down a track from $$A$$ to $$B$$ from a height $$h = {{ params.h }} m$$ and a horizontal distance $$d = {{ params.d }} m$$ away from point B as shown in the diagram below. If the toy has a velocity of $${{ params.va }} m/s$$ down the incline at point $$A$$, and a velocity of $${{ params.vb }} m/s$$ at point $$B$$, what is the work done by friction as the toy moves from point A to point B?

## Part 1#

Please enter in a numeric value in $$J$$.