1.
Set up track with timer.
2. Weigh
the car and record weight.
3. Race
car down the track (3 times).
4. Record
the time for each run.
5. Add one
weight to the car. Weigh and record weight.
6. Race
car down the track (3 times).
7. Record
the time for each run.
8. Repeat
steps 5, 6, and 7 adding weight each time until all the holes in the
car are filled.
