Pulley Lesson Preparation of Questions
Preparation
1. Is pulley simple machine?
2. Why/why not? List characteristics that makes it a machine/not machine
3. Class definition of a machine
4. students have a look at the force meters (spring scales)
5. measure weight of the object
Situation 1
6. What will scale show? In position 1?
7. Build theory. Why does it show (nearly) the same?
8. What will scale show? In position 2?
9. Extend/revise theory. Why does it show (nearly) the same?
10. What will scale show? In position 3?
11. Extend/revise theory. Why does it show about 2 x weight?
Situation 2
12. What will scale show? In position 1?
13. Build theory. Why does it show 1/2 weight?
14. What will scale show? In position 2?
15. Extend/revise theory. Why does it show 1/2 weight?
16. What will scale show? In position 3?
17. Extend/revise theory. Why does it show (nearly) the same?
Reflection
18. Write into your notebook what you have learned about pulleys. What struck you the most?