Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 627 · 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) an empty thread reel (c) a balloon (d) a pencil
2. 2.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
3. 3.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a spoon lifting a lid (d) a steering wheel
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a balloon (d) yeast
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) in a circle (d) up
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
8. 8.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) string (d) a magnet
10. 10.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
11. 11.True or false: a sloping road is a lever. (a) False (b) True
12. 12.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a balloon (d) turmeric powder
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) an empty thread reel (d) coins as the load
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
19. 19.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
21. 21.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not 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 measure it (b) we change it (c) we keep it the same
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
24. 24.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a mirror (d) a pencil
27. 27.⚖️ 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
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) yeast (c) a small paper cup (d) coins as the load
29. 29.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
30. 30.True or false: a sloping road is an inclined plane. (a) False (b) True
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a pencil (d) turmeric powder
32. 32.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
33. 33.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
34. 34.⚖️ 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) False (b) True
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) False (b) True
36. 36.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a see-saw (c) a steering wheel (d) a ramp
37. 37.⚖️ 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
38. 38.True or false: a ramp uses a pulley. (a) False (b) True
39. 39.True or false: a crowbar uses a pulley. (a) True (b) False
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier

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