Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 249 · 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 pencil (b) turmeric powder (c) coins as the load (d) string
2. 2.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a balloon (d) an empty thread reel
4. 4.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) string
7. 7.True or false: string is needed for the thread-reel pulley. (a) False (b) True
8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) yeast (d) an empty thread reel
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (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) zero (b) about half (c) double (d) the same
13. 13.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it gets longer (d) it turns blue
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a magnet (d) an empty thread reel
17. 17.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
18. 18.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) coins as the load (d) a balloon
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
21. 21.⚖️ 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) False (b) True
22. 22.True or false: a see-saw is a lever. (a) False (b) True
23. 23.True or false: a tap handle is a wheel and axle. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a pencil (d) turmeric powder
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the lifting height (c) number of pulleys
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.True or false: a doorknob is an inclined plane. (a) True (b) False
28. 28.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
29. 29.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a battery cell (c) coins as the load (d) string
31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ 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) the same string (c) how hard we must pull (d) number of pulleys
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
35. 35.True or false: a sloping road is a lever. (a) False (b) True
36. 36.⚙️ Which of these uses a pulley? (a) a crowbar (b) a sloping road (c) a steering wheel (d) a crane
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a balloon
38. 38.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
39. 39.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) yeast (d) a magnet

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