Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 23 · 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.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
2. 2.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) coins as the load
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) the same (d) about half
6. 6.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a magnet (d) coins as the load
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) yeast (d) string
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a battery cell (d) a pencil
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
12. 12.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
16. 16.⚖️ 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 lifting height (c) the same cup of coins (d) how hard we must pull
17. 17.⚖️ 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
18. 18.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a ramp (d) a doorknob
19. 19.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a mirror (d) a battery cell
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a mirror (d) a small paper cup
23. 23.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
24. 24.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
26. 26.⚙️ Which of these is a lever? (a) a steering wheel (b) a crane (c) a flagpole (d) a see-saw
27. 27.🇮🇳 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
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
29. 29.⚖️ 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) the same string (c) how hard we must pull
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a mirror (d) a magnet
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.⚖️ 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
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same cup of coins
35. 35.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.True or false: string is needed for the thread-reel pulley. (a) True (b) False
37. 37.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
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 see-saw uses a pulley. (a) False (b) True

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