Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 929 · 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.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
4. 4.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
5. 5.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
6. 6.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) changes pull direction (d) makes it magnetic
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
8. 8.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
9. 9.⚖️ 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) True (b) False
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a battery cell
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) number of pulleys (c) the same string (d) the same cup of coins
12. 12.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
13. 13.True or false: a see-saw uses a pulley. (a) True (b) False
14. 14.True or false: a crane uses a pulley. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) turmeric powder
17. 17.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) a battery cell (c) a magnet (d) turmeric powder
18. 18.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) water gets lighter (c) the rope gets shorter (d) the bucket floats
20. 20.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
21. 21.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
22. 22.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
23. 23.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.🛟 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
27. 27.True or false: a bottle opener is a lever. (a) False (b) True
28. 28.⚖️ 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
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
30. 30.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
31. 31.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) an empty thread reel (d) a pencil
33. 33.⚙️ Which of these uses a pulley? (a) a crowbar (b) a slide (c) a crane (d) a see-saw
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
35. 35.⚖️ 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 measure it (c) we keep it the same
36. 36.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
37. 37.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a well pulley (d) a sloping road
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
40. 40.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a slide (c) a crowbar (d) a bottle opener

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