How do you measure the speed of a toy car going down a ramp?

I'm doing a science fair project and i need to know how to measure the speed.How do you measure the speed of a toy car going down a ramp?
well put a cup at the end of the ramp and instead measure how far a certain brand of car goes youll need

1. a cup

2. measuring tape

3. atleast 5 diffrent brands of cars

4. a rampHow do you measure the speed of a toy car going down a ramp?
dood wen i 1st red yer question i wuz gonna say u need science but looks like u gut dat part cvered all redy so i am gessin yer gunna need steel 1 of dose thins dat the cops b usin 2 tell ppl dat dey b drivin so fast an stuff so i hope u b winin yer science fare thing an good luck an dont ferget u can send me an emayl if u got any questuns lol lol lol