Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 921 · 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? True or false: the same string is kept the same. (a) False (b) True
2. 2.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) coins as the load (d) a small paper cup
4. 4.True or false: a sloping road is a lever. (a) False (b) True
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) yeast (d) an empty thread reel
6. 6.True or false: a crane uses a pulley. (a) False (b) True
7. 7.⚖️ 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) how hard we must pull (d) the same string
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a mirror (d) a small paper cup
9. 9.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
12. 12.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) yeast (d) an empty thread reel
14. 14.🛟 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
15. 15.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
16. 16.🛟 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
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a crowbar (d) a flagpole
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) a small paper cup
20. 20.⚖️ 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 keep it the same (c) we measure it
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) an empty thread reel (c) a pencil (d) coins as the load
24. 24.⚖️ 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
25. 25.True or false: a see-saw is a lever. (a) True (b) False
26. 26.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) rope (c) nail (d) battery
28. 28.True or false: a ramp is a lever. (a) True (b) False
29. 29.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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) number of pulleys (c) the same cup of coins
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) water gets lighter (d) pulling down is easier
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a small paper cup (d) a magnet
33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a magnet (d) string
37. 37.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a magnet (d) a mirror
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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