Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 179 · 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.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
2. 2.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
3. 3.True or false: a see-saw is an inclined plane. (a) True (b) False
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
6. 6.⚖️ 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
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
9. 9.⚖️ 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
10. 10.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
11. 11.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
12. 12.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
13. 13.⚙️ Which of these is a lever? (a) a ramp (b) a sloping road (c) a slide (d) a see-saw
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) an empty thread reel (d) a pencil
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
17. 17.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) an empty thread reel (d) coins as the load
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a balloon
20. 20.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
21. 21.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a magnet (d) yeast
23. 23.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) string (d) a mirror
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
26. 26.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
27. 27.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the flagpole (d) on the bench
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a pencil (d) string
29. 29.True or false: coins as the load is not 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) coins as the load (b) an empty thread reel (c) string (d) a battery cell
31. 31.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
33. 33.True or false: a bottle opener is a lever. (a) True (b) False
34. 34.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a magnet
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) string (d) a pencil
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
38. 38.🔮 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
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) string (c) an empty thread reel (d) coins as the load
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) turmeric powder (d) a small paper cup

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