Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 57 · 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.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) battery (d) rope
2. 2.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) coins as the load (d) a pencil
4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a steering wheel (c) a doorknob (d) a flagpole
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) a mirror (d) an empty thread reel
6. 6.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it can hurt your finger (d) it gets longer
9. 9.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
10. 10.🏗️ 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
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same string (b) how hard we must pull (c) number of pulleys
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) yeast
13. 13.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) turmeric powder
15. 15.True or false: a see-saw is a lever. (a) True (b) False
16. 16.🛟 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
17. 17.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
19. 19.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) string (d) an empty thread reel
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a balloon (d) a pencil
22. 22.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a battery cell
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) a battery cell (d) a magnet
28. 28.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a steering wheel (d) a spoon lifting a lid
29. 29.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
30. 30.True or false: a spoon lifting a lid is a lever. (a) False (b) True
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) number of pulleys (d) the same string
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) a small paper cup (d) an empty thread reel
33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a sloping road is a wheel and axle. (a) False (b) True
37. 37.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) coins as the load (d) a mirror
38. 38.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
39. 39.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
40. 40.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a slide (c) a bottle opener (d) a flagpole

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