Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 800 · 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 cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
3. 3.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
4. 4.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) a pencil (d) a small paper cup
6. 6.⚖️ 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) the lifting height (c) number of pulleys
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) yeast (d) a magnet
8. 8.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
10. 10.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
11. 11.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a see-saw (d) a crane
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a battery cell (d) string
14. 14.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a magnet (d) a small paper cup
17. 17.🧺 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) a balloon (d) a pencil
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) coins as the load (d) turmeric powder
19. 19.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
20. 20.⚖️ 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
21. 21.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) a small paper cup
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a magnet (d) a mirror
25. 25.True or false: a steering wheel is a lever. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) turmeric powder (d) an empty thread reel
29. 29.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
31. 31.⚙️ Which of these is a lever? (a) a doorknob (b) a well pulley (c) a steering wheel (d) a spoon lifting a lid
32. 32.⚙️ Which of these is a lever? (a) a crane (b) a tap handle (c) a bottle opener (d) a well pulley
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
34. 34.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a small paper cup (d) an empty thread reel
38. 38.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) the same string (d) number of pulleys
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter

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