Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 750 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) a small paper cup (d) a pencil
2. 2.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it could fall on you (c) it is magnetic (d) it might sing
3. 3.⚖️ 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
4. 4.True or false: a flagpole uses a pulley. (a) False (b) True
5. 5.True or false: string is needed for the thread-reel pulley. (a) True (b) False
6. 6.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a steering wheel (d) a crane
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
8. 8.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
13. 13.True or false: a bottle opener is a wheel and axle. (a) True (b) False
14. 14.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a see-saw (c) a flagpole (d) a tap handle
15. 15.⚖️ 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 same string
16. 16.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
19. 19.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a magnet (d) a battery cell
21. 21.⚖️ 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
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) yeast
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) an empty thread reel (d) a small paper cup
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
27. 27.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a flagpole (c) a see-saw (d) a well pulley
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) a magnet
29. 29.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
30. 30.True or false: a crane uses a pulley. (a) True (b) False
31. 31.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) coins as the load (d) a magnet
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a battery cell (d) a magnet
34. 34.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a mirror (d) a battery cell
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a battery cell
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
40. 40.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a slide (d) a tap handle

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