Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 746 · 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.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🧺 Do we need string 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? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the same string
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a pencil (d) coins as the load
7. 7.True or false: a crane uses a pulley. (a) True (b) False
8. 8.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) an empty thread reel (d) a small paper cup
10. 10.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) string
13. 13.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a flagpole (d) a well pulley
14. 14.⚖️ 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
15. 15.⚙️ Which of these is a lever? (a) a slide (b) a crane (c) a flagpole (d) a crowbar
16. 16.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a doorknob (d) a steering wheel
17. 17.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
18. 18.⚖️ 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) the same cup of coins (d) how hard we must pull
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) a battery cell (d) a balloon
20. 20.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
22. 22.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) nail (d) rope
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) True (b) False
24. 24.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a pencil
26. 26.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) a battery cell (d) an empty thread reel
28. 28.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
29. 29.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
30. 30.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
31. 31.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
32. 32.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ 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
34. 34.🧺 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) yeast (d) a pencil
35. 35.⚖️ 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 keep it the same (c) we change it
36. 36.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
37. 37.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) turmeric powder (d) coins as the load
39. 39.🇮🇳 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
40. 40.⚖️ 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

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