Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 372 · 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) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) an empty thread reel (d) a pencil
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) coins as the load (d) an empty thread reel
4. 4.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.True or false: a steering wheel is a wheel and axle. (a) False (b) True
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
8. 8.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
9. 9.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a slide is an inclined plane. (a) True (b) False
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a mirror (d) an empty thread reel
12. 12.⚖️ 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
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the lifting height (d) the same cup of coins
14. 14.🧺 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 magnet (d) a pencil
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) a small paper cup (d) a battery cell
16. 16.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
17. 17.⚖️ 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
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
19. 19.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
20. 20.True or false: a sloping road is a lever. (a) True (b) False
21. 21.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) a pencil
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
25. 25.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (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) turmeric powder (c) a battery cell (d) a balloon
29. 29.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 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) yeast (d) string
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
33. 33.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
35. 35.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
36. 36.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
38. 38.⚖️ 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 change it (c) we measure it
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a small paper cup (d) a magnet
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True

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