This week in science we did an experiment with toy cars to see if they stayed at a constant speed or if they sped up or slowed down. We marked off every 10 centimeters on the floor and started the car off at a starting line near the begining of the marks. Someone acted as a metronome and told the other people in the group when every second passed. We started the car and when a second passed someone marked off where the car was. When the car went far enough we stopped it and looked at the marks on the floor. The marks were different distances apart but generally the same. We came to the conclusion that the car was moving at a constant rate. It didn't speed up or slow down.