Algodoo

a small car and a sloped convaror belt
tested at car's max speed (convaror in nutruel and car powering it)
car controles , .(brake) / convaor controles(all togle) arow keys left right down.

the car controles are just like the arowkeys just comma period and questionmark

fun things to do
drive up a down belt
roll down an up belt
run car on nutrel belt
ride up the belt using car brakes.

if u plan to uuse the convaor in ur scene plz mention you got it from me thanks