Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 383 · 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? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
3. 3.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
4. 4.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
6. 6.True or false: a see-saw uses a pulley. (a) False (b) True
7. 7.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
8. 8.⚖️ 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
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) a pencil (d) a small paper cup
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a balloon
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
16. 16.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a ramp (d) a bottle opener
17. 17.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a mirror (d) a magnet
19. 19.⚙️ Which of these is a lever? (a) a slide (b) a tap handle (c) a see-saw (d) a well pulley
20. 20.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
22. 22.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) turmeric powder (c) string (d) an empty thread reel
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
25. 25.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
27. 27.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a tap handle (c) a well pulley (d) a sloping road
28. 28.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
29. 29.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a balloon (d) a magnet
31. 31.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) turmeric powder (d) a small paper cup
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a pencil (d) a mirror
36. 36.⚖️ 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 cup of coins (d) how hard we must pull
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a balloon (d) a magnet
38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) a mirror (d) yeast

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