Create an object that will accelerate down a ramp

[ronshore]

I have to create an object that will accelerate down a ramp and travel for a distance of three metres and stop. No braking systems allowed. Once i know the angle of the ramp what factors do i need to consider?

 

[Drakkith]

Well, list a few factors that you think you need to consider other than ramp angle. Also, are you sure you have to get the ramp angle first, or could it wait till you get other factors?