# 1. How consistent is the distance an individual pull-back car travels after being pulled back a specific distance?

RED                                    SILVER                                            BLACK

3.5m                                      2.1m                                                 3.15m

Our first test we pulled back each truck 20cm and then released the truck and measured how far each truck went. With the results being very different, it showed that the trucks are not consistent on far they move.

# 2. How consistent is the amount of time an individual pull-back car travels after being pulled back a specific distance?

RED                                      SILVER                                             BLACK

5.23s                                       4.36s                                                 4.68s

We pulled back each truck 20cm and released it. We timed how long the truck took to come to a complete stop. The trucks are not consistent with how long they take to stop.

# 3. How straight does an individual pull-back car travel?

RED                                  SILVER                                    BLACK

drift right                           drift right                               drift right

For this test we pulled each car back 20cm and released it. We lined up the cars along the edge of the table. If the car fell off the table then it drifted right and if the car ended up not along the edge than the car drifted left. All the cars fell off the table at different times. This shows that the cars do not travel very straight.

# 4. Do all pull-back cars behave similarly?

For this question we combined and compared all the data from the other tests. All the cars traveled different distances, took different amount of time to come a complete stop, but they all drifted right to a different degree. So we concluded that these trucks do not behave similarly.