Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 738 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) yeast (d) string
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) an empty thread reel (d) a pencil
4. 4.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
6. 6.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
7. 7.True or false: a doorknob is a wheel and axle. (a) False (b) True
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) how hard we must pull (d) the same cup of coins
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) how hard we must pull (c) the same cup of coins (d) the same string
10. 10.True or false: a see-saw uses a pulley. (a) True (b) False
11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
13. 13.True or false: a see-saw is an inclined plane. (a) True (b) False
14. 14.True or false: a sloping road uses a pulley. (a) False (b) True
15. 15.⚙️ Which of these uses a pulley? (a) a crowbar (b) a ramp (c) a flagpole (d) a bottle opener
16. 16.⚖️ 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
17. 17.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
18. 18.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
19. 19.⚖️ 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
20. 20.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
21. 21.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
22. 22.⚖️ 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 measure it (c) we keep it the same
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a battery cell (d) an empty thread reel
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
25. 25.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a well pulley (d) a ramp
27. 27.True or false: a well pulley is an inclined plane. (a) False (b) True
28. 28.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a steering wheel (d) a crowbar
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
30. 30.True or false: a see-saw is a lever. (a) True (b) False
31. 31.True or false: an empty thread reel 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) yeast (b) turmeric powder (c) a pencil (d) a balloon
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) coins as the load (d) a pencil
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) a mirror (d) an empty thread reel
36. 36.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) a small paper cup
38. 38.⚖️ 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
39. 39.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the rope gets shorter (d) the bucket floats
40. 40.🇮🇳 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

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