Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 906 · 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.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
2. 2.True or false: a sloping road is a lever. (a) True (b) False
3. 3.⚖️ 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 string (b) number of pulleys (c) the lifting height (d) how hard we must pull
4. 4.⚖️ 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
5. 5.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) adds weight (d) halves the weight
6. 6.True or false: a tap handle is a wheel and axle. (a) False (b) True
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a pencil (d) string
8. 8.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a pencil (d) coins as the load
10. 10.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) a small paper cup (d) coins as the load
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a balloon (d) a battery cell
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
14. 14.⚖️ 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 same cup of coins
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
16. 16.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
17. 17.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
19. 19.⚖️ 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
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
21. 21.True or false: a crowbar is a lever. (a) False (b) True
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
24. 24.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
25. 25.⚙️ Which of these is a lever? (a) a bottle opener (b) a doorknob (c) a flagpole (d) a sloping road
26. 26.True or false: a battery cell 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? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.⚖️ 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 change it (c) we measure it
29. 29.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
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) a small paper cup (d) a battery cell
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.True or false: a crowbar is an inclined plane. (a) True (b) False
34. 34.True or false: a steering wheel is a wheel and axle. (a) False (b) True
35. 35.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
37. 37.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a see-saw (c) a spoon lifting a lid (d) a slide
38. 38.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a mirror (d) a magnet
40. 40.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle

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