Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 579 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a small paper cup (d) turmeric powder
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) string (d) an empty thread reel
3. 3.True or false: a crowbar is a lever. (a) True (b) False
4. 4.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a crowbar (c) a slide (d) a steering wheel
5. 5.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) coins as the load (d) a balloon
8. 8.True or false: a crane uses a pulley. (a) False (b) True
9. 9.⚖️ 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
10. 10.⚙️ Which of these is a lever? (a) a flagpole (b) a well pulley (c) a spoon lifting a lid (d) a crane
11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
12. 12.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull (d) the lifting height
15. 15.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a mirror (d) an empty thread reel
19. 19.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚖️ 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
22. 22.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
23. 23.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) zero (d) double
24. 24.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a crowbar (d) a flagpole
26. 26.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
27. 27.True or false: string is needed for the thread-reel pulley. (a) True (b) False
28. 28.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
29. 29.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) string (d) a battery cell
32. 32.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a tap handle (d) a crane
33. 33.⚖️ 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) False (b) True
34. 34.⚖️ 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) False (b) True
35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same string (c) the lifting height (d) number of pulleys
37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.True or false: a doorknob is a lever. (a) True (b) False
40. 40.⚙️ Which of these is a wheel and axle? (a) a crane (b) a slide (c) a tap handle (d) a flagpole

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