# Bobsled

## Bobsled Basics

• Which force makes the bobsled move?

• Building instructions book "B," pages 40 - 66

## 3, 2, 1, go!

Experiment 1:

• Put the Minifigures on your bobsled and test how far it'll go.
• Use a yardstick to measure the distance your bobsled traveled.
• On your worksheet or a similar chart in your notebook, record the distance traveled.
• Do 3 test runs.
• Record the distance your bobsled traveled each time, and then circle the middle distance.

## Faster!

Experiment 2:

• Now, test your bobsled with the black block that you've built. Mark your prediction for how far it'll travel.
• Do 3 test runs.
• Record the distance your bobsled traveled each time, and then circle the middle distance.

## Faster... faster!

Experiment 3:

• Now, compare the heavy black brick to the black block you've just tested.
• Again, use a brick to mark your prediction.
• Test 3 times to see if you were right.
• Don’t forget to record the distance each time and circle the middle distance.

## What did you see?

• Which forces did you observe?
• Did you see any patterns?