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?