Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 707 · 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 battery cell for the thread-reel pulley? (a) needed (b) not needed
2. 2.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
3. 3.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
4. 4.⚙️ Which of these is a lever? (a) a steering wheel (b) a slide (c) a ramp (d) a bottle opener
5. 5.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
6. 6.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a magnet
10. 10.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
11. 11.⚙️ Which of these uses a pulley? (a) a flagpole (b) a slide (c) a crowbar (d) a bottle opener
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) string (d) a battery cell
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a pencil (d) an empty thread reel
14. 14.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
15. 15.True or false: string is needed for the thread-reel pulley. (a) False (b) True
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 measure it (b) we keep it the same (c) we change it
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a small paper cup (d) yeast
19. 19.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
21. 21.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
22. 22.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
23. 23.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a steering wheel (c) a crowbar (d) a crane
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) on the blackboard (d) in the tap
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
26. 26.True or false: a steering wheel is a wheel and axle. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) a pencil (d) a mirror
28. 28.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
29. 29.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 20 cm (d) 40 cm
30. 30.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) pulling down is easier (d) the bucket floats
31. 31.⚖️ 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
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a mirror (d) a pencil
34. 34.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
35. 35.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a balloon
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a magnet (d) a small paper cup
38. 38.⚖️ 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) how hard we must pull (c) the same string
39. 39.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
40. 40.⚖️ 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 same string (c) how hard we must pull (d) number of pulleys

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