- Which force(s) make the gymnast move?
- What keeps him moving?
Build Your Gymnast
- Building instructions, pages 4 - 22
Try it out!
Experiment 1: No Ratchets
- Pull the gymnast back 90 degrees (i.e. parallel with the table) and let him go.
- Can you see a pattern? What is it?
- Why does the gymnast move this way?
Experiment 2: Try the Forward Ratchet
- Pull the gymnast back 90 degrees and let him go.
- Measure the distance that the car travels and record it on the chart or in your notebook.
- Now return the gymnast to his starting position and predict (p) how far the car will go if you pull the gymnast back as far as he can go. Use a LEGO® brick to mark where you think it will stop and record the actual distance (a) on the chart.
Experiment 3: No ratchets again, but let it rest against your hand!
- Which of Newton’s 3 laws of motion can you observe here?
What did you find out?
- Which forces did you observe?
- What pattern did you observe?
- Could you predict what would happen next?
- Which force(s) slowed your gymnast down?
- What could you change to make your car go even farther?