Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 255 · 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.⚖️ 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
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a battery cell (d) string
3. 3.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
4. 4.⚙️ Which of these is a lever? (a) a steering wheel (b) a bottle opener (c) a flagpole (d) a ramp
5. 5.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a spoon lifting a lid (c) a slide (d) a crane
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
7. 7.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
8. 8.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
9. 9.⚖️ 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) the same cup of coins (c) how hard we must pull (d) the lifting height
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
11. 11.⚖️ 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
12. 12.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a slide (c) a steering wheel (d) a well pulley
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) coins as the load (d) string
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a pencil (d) an empty thread reel
15. 15.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
16. 16.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
17. 17.🧺 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 pencil (d) coins as the load
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a magnet (d) an empty thread reel
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) the lifting height
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.⚖️ 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
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
25. 25.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
26. 26.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
28. 28.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
29. 29.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
31. 31.True or false: a ramp is a lever. (a) True (b) False
32. 32.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
33. 33.True or false: a see-saw is a lever. (a) True (b) False
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a pencil (d) a battery cell
35. 35.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
36. 36.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) an empty thread reel (d) yeast
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) turmeric powder (d) a pencil
39. 39.True or false: a well pulley is an inclined plane. (a) True (b) False
40. 40.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed

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