Weightlifter
The Basics of Weightlifting
- Which forces help a weightlifter lift the weights?
- Which force makes the weights come back down?
- What is a pulley? What is a block and tackle? How can these help a weightlifter train?
![U2L5.EngageThumbnail.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blte68f9b0861ccbc07/5ed0f6cea098c2506bbf90c5/U2L5.EngageThumbnail.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Build the Weightlifter
- Building instructions book ‘B’, pages 68 - 86
![U2L5.Thumbnail.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/bltd73b1d6b36df86ea/5fd228d3a84f233eaf610678/U2L5_-_doodleThumbnail.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
Can you lift it?
Experiment 1:
- Test to see if the model can raise the weights.
- What did you notice?
- Record your observations on your worksheet.
- Remove one wheel from the barbell at a time. Test to see if the weightlifter can lift it.
- How many do you have to remove before the barbell can be lifted?
Yes, you can!
Experiment 2:
- Change the model to pulley position 2 and test it again.
- What was different?
- Record your observations on your worksheet.
- How much can the weightlifter lift? Add bricks from the set to find out.
![_U2L5.02.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/bltd4a9fe0561449079/5ece45dbd94d9d1a6948e6f7/_U2L5.02.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)
What did you see?
- Which forces did you observe?
![45401-assessment.png](https://assets.education.lego.com/v3/assets/blt293eea581807678a/blteca493632139998a/5fd71e6650460c30dd541156/45401_ModDetail_262.png?locale=en-au&auto=webp&format=jpeg&width=1800&quality=90&fit=bounds)