Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 711 · 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.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a see-saw (d) a crane
2. 2.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
3. 3.⚖️ 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 string (b) number of pulleys (c) the same cup of coins (d) the lifting height
4. 4.True or false: a crane uses a pulley. (a) False (b) True
5. 5.⚖️ 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
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a magnet (c) a balloon (d) yeast
9. 9.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it gets wet (d) it can hurt your finger
10. 10.⚖️ 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
11. 11.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
12. 12.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a flagpole (d) a sloping road
13. 13.⚖️ 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) True (b) False
14. 14.🔮 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
15. 15.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
16. 16.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
18. 18.True or false: a bottle opener uses a pulley. (a) True (b) False
19. 19.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
20. 20.⚙️ Which of these uses a pulley? (a) a doorknob (b) a steering wheel (c) a well pulley (d) a crowbar
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) the same string (d) how hard we must pull
22. 22.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
23. 23.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
30. 30.True or false: a flagpole uses a pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) a small paper cup (d) coins as the load
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a balloon
33. 33.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a flagpole (d) a bottle opener
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a magnet (d) a pencil
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
36. 36.⚙️ Which of these uses a pulley? (a) a slide (b) a crane (c) a crowbar (d) a doorknob
37. 37.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ 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
40. 40.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter

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