# Hot Wheels Velocity Lab - Jr

## Introduction

You are going to experiement with three different **variables** to find the fastest car on the fastest track!

###### Things to change:

- Type of Car (Lamborghini, truck, race car, etc)
- Shape of the track (straight, curved, bumpy, etc)
- Starting Position (How far from the start of the track the race starts)

**Keep the same:**

- Height of track at the starting point (must be height of the table)

## 1) Starting Position

Start | Distance cm | Time s | Velocity cm/s |
---|---|---|---|

Top | |||

Middle | |||

Bottom |

- Choose one car (don't switch cars)
- Setup a straight track (don't change the shape of the track)
- Choose and record a starting position
- Measure the distance the car will travel (in cm)
- Measure the time it takes the car to travel that distance (in sec)
- Calculate the velocity of the car
*(distance ÷ time)* - Record the
**starting point**and your measurements and caluclations in Excel - Repeat for
**5**different starting points **Question**: Which starting point was the fastest? Why?

## 2) Track Shape

Shape | Distance cm | Time s | Velocity cm/s |
---|---|---|---|

A-Straight | |||

B-Curve | |||

C-Drop | |||

D-Hill | |||

E-Yours |

- Choose one car (don't switch cars)
- Setup one of the track shapes shown below
- Always start at the top of the track
- Measure the distance the car will travel (in cm)
*(hint: it should be the same for all track shapes)* - Measure the time it takes the car to travel that distance (in sec)
- Calculate the velocity of the car
*(distance ÷ time)* - Record the
**track shape**and your measurements and caluclations in Excel - Repeat for the
**4**different track shapes shown - Invent
**your own track shape**and repeat the velocity measurement **Question**: Is a straight line the fastest way? Why or Why not?

## 3) Car Type

Car | Distance cm | Time s | Velocity cm/s |
---|---|---|---|

1 | |||

2 | |||

3 | |||

4 | |||

5 |

- Setup the fastest track shape you found
- Always start at the top of the track
- Choose a car
*(you can trade with other groups and/or use your own cars)* - Measure the distance the car will travel (in cm)
- Measure the time it takes the car to travel that distance (in sec)
- Calculate the velocity of the car
*(distance ÷ time)* - Record the
**car-type**and your measurements and caluclations in Excel - Repeat for at least
**5**different cars **Question**: Which car was the fastest? Why?