Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 611 · 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: string is needed for the thread-reel pulley. (a) False (b) True
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) string (d) a balloon
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a balloon (c) a magnet (d) yeast
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) yeast (d) coins as the load
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a balloon (d) turmeric powder
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same string (b) the same cup of coins (c) number of pulleys (d) the lifting height
7. 7.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a small paper cup (d) a pencil
9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
10. 10.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) turmeric powder (d) coins as the load
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) double (d) the same
14. 14.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
15. 15.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
16. 16.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) coins as the load (d) a magnet
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a pencil (d) a battery cell
20. 20.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) an empty thread reel (d) a pencil
22. 22.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a magnet (d) a small paper cup
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a battery cell (d) a pencil
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) string
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a mirror (d) a pencil
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a well pulley (c) a spoon lifting a lid (d) a steering wheel
30. 30.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
31. 31.⚖️ 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) how hard we must pull (c) the same string (d) the lifting height
32. 32.⚖️ 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
33. 33.True or false: a bottle opener is a wheel and axle. (a) False (b) True
34. 34.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: a steering wheel is a wheel and axle. (a) True (b) False
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
37. 37.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a slide uses a pulley. (a) False (b) True
39. 39.True or false: a flagpole is a lever. (a) True (b) False
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder

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