Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 455 · 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) a small paper cup (b) a pencil (c) coins as the load (d) a battery cell
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) turmeric powder
3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
4. 4.⚖️ 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) the same string (d) the lifting height
5. 5.🛟 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
6. 6.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) changes pull direction (c) halves the weight (d) adds weight
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) a battery cell (d) a small paper cup
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.⚖️ 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) True (b) False
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a magnet (d) string
12. 12.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
13. 13.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the same string (d) how hard we must pull
15. 15.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
16. 16.⚖️ 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
17. 17.True or false: a ramp is a wheel and axle. (a) True (b) False
18. 18.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a well pulley (d) a bottle opener
19. 19.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
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 measure it (c) we change it
23. 23.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a bottle opener (c) a see-saw (d) a doorknob
24. 24.True or false: a well pulley is a lever. (a) True (b) False
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a balloon (d) string
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the blackboard (d) on the bench
28. 28.True or false: a crane uses a pulley. (a) True (b) False
29. 29.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) yeast (c) turmeric powder (d) coins as the load
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ 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) number of pulleys (c) how hard we must pull
35. 35.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Do we need string 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) an empty thread reel (b) a pencil (c) a small paper cup (d) yeast
38. 38.True or false: a flagpole is a lever. (a) False (b) True
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
40. 40.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True

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