Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 726 · 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 crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
2. 2.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) a small paper cup
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) coins as the load (d) a small paper cup
5. 5.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
6. 6.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) a pencil
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a balloon
9. 9.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
10. 10.⚖️ 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
11. 11.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
12. 12.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
14. 14.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
15. 15.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
16. 16.⚖️ 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) the same string (c) how hard we must pull (d) number of pulleys
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a small paper cup (d) a balloon
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) coins as the load (d) a magnet
20. 20.🛟 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
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
23. 23.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
24. 24.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) yeast (d) a pencil
27. 27.🧺 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 magnet (d) string
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
29. 29.True or false: a flagpole uses a pulley. (a) False (b) True
30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) yeast
31. 31.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
32. 32.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
36. 36.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
38. 38.⚖️ 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) how hard we must pull (c) the lifting height
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.⚖️ 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 cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys

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