Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 123 · 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.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
4. 4.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
5. 5.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
6. 6.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it turns blue (d) it can hurt your finger
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the lifting height (d) the same string
12. 12.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.True or false: a see-saw uses a pulley. (a) True (b) False
14. 14.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
15. 15.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) string (d) a pencil
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
21. 21.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) an empty thread reel (d) turmeric powder
23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) yeast (d) a balloon
25. 25.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) string (c) a pencil (d) an empty thread reel
28. 28.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) coins as the load (d) an empty thread reel
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull
31. 31.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a spoon lifting a lid (d) a see-saw
32. 32.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
33. 33.⚖️ 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
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same string (d) the same cup of coins
35. 35.True or false: a steering wheel is an inclined plane. (a) True (b) False
36. 36.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
37. 37.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) magnet (d) battery
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) string (d) a pencil
39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) turmeric powder (d) coins as the load

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