Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 764 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) turmeric powder (d) an empty thread reel
3. 3.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a pencil (d) string
7. 7.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a balloon (c) a pencil (d) string
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
10. 10.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
12. 12.True or false: a bottle opener is a wheel and axle. (a) True (b) False
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) yeast
18. 18.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a magnet (d) string
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
22. 22.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a ramp (c) a see-saw (d) a spoon lifting a lid
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a balloon
24. 24.True or false: a well pulley uses a pulley. (a) True (b) False
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) string (d) an empty thread reel
26. 26.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
27. 27.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a ramp (d) a see-saw
28. 28.True or false: a flagpole is an inclined plane. (a) True (b) False
29. 29.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a slide (c) a crowbar (d) a well pulley
30. 30.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a mirror (d) yeast
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
37. 37.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
39. 39.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) rope (d) magnet
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) an empty thread reel (d) string

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