Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 377 · 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.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
2. 2.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
3. 3.True or false: string is needed for the thread-reel pulley. (a) False (b) True
4. 4.🏗️ 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
5. 5.True or false: a see-saw is a wheel and axle. (a) True (b) False
6. 6.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
7. 7.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
8. 8.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
9. 9.⚖️ 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 lifting height
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a pencil (d) a balloon
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a balloon
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a magnet (d) string
13. 13.True or false: a tap handle is an inclined plane. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a balloon (d) a battery cell
15. 15.🧺 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 magnet
16. 16.⚖️ 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 measure it (c) we change it
17. 17.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a mirror (d) coins as the load
19. 19.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
20. 20.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) coins as the load (d) an empty thread reel
22. 22.⚖️ 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 measure it (c) we change it
23. 23.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
24. 24.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
25. 25.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
26. 26.⚖️ 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 same cup of coins (c) how hard we must pull
27. 27.⚖️ 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
28. 28.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
29. 29.⚖️ 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
30. 30.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
31. 31.🧺 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 battery cell (d) a small paper cup
32. 32.True or false: a crowbar is a lever. (a) False (b) True
33. 33.True or false: a bottle opener is a lever. (a) False (b) True
34. 34.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a spoon lifting a lid (d) a flagpole
35. 35.⚖️ 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
36. 36.True or false: a crowbar uses a pulley. (a) True (b) False
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
38. 38.True or false: a well pulley is a wheel and axle. (a) False (b) True
39. 39.⚖️ 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 same string (c) how hard we must pull
40. 40.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed

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