Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 134 · 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.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a balloon (d) a pencil
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
8. 8.True or false: string is needed for the thread-reel pulley. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
11. 11.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
13. 13.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
14. 14.True or false: a bottle opener is a wheel and axle. (a) False (b) True
15. 15.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the lifting height (c) the same cup of coins (d) how hard we must pull
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a mirror (d) turmeric powder
18. 18.⚙️ Which of these is a lever? (a) a doorknob (b) a steering wheel (c) a crowbar (d) a flagpole
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
20. 20.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
21. 21.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
23. 23.🛟 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
24. 24.⚖️ 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
25. 25.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
26. 26.🧺 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 mirror
27. 27.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a magnet (d) a balloon
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
30. 30.True or false: an empty thread reel is not 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? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a balloon (d) a magnet
34. 34.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
35. 35.True or false: a crowbar is a lever. (a) False (b) True
36. 36.⚙️ Which of these uses a pulley? (a) a slide (b) a well pulley (c) a tap handle (d) a doorknob
37. 37.⚖️ 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
38. 38.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) string (d) a pencil
40. 40.🧺 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

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