Gymnast
Fantastic gymnastics!
- Which force(s) make the gymnast move?
- What keeps him moving?
![U3L2.EngageThumbnail.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt85e0696196e86b2c/5ed0f82fa65f2c0a5705402e/U3L2.EngageThumbnail.png?locale=en-gb&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Build Your Gymnast
- Building instructions, pages 4 - 22
![U3L2.Thumbnail.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt770221f803ed836b/5fd22a11e5f85744d50f315b/U3L2_-_doodleThumbnail.png?locale=en-gb&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
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.
![U3L2.Ratchet.90.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt8f43a5245d1802e8/5ec3cf463a450a58554b5fcd/U3L2.Ratchet.90.png?locale=en-gb&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
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?
![45400-assessment.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blt5fc70ba0f35f29d4/5fd71e3be5f85744d50f3e13/45400_ModDetail_263.png?locale=en-gb&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)