Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 206 · 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.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
3. 3.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a battery cell (c) an empty thread reel (d) a magnet
7. 7.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a pencil (d) a magnet
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
11. 11.⚖️ 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
12. 12.⚖️ 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) the lifting height (c) the same cup of coins (d) how hard we must pull
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a small paper cup (d) a magnet
14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
15. 15.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
16. 16.True or false: string is needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) a small paper cup (d) string
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) the same (d) easier
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) number of pulleys (d) the same string
20. 20.True or false: a bottle opener uses a pulley. (a) True (b) False
21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a pencil (d) a balloon
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the flagpole (d) on the blackboard
25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a sloping road (d) a see-saw
27. 27.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
29. 29.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a battery cell (d) coins as the load
33. 33.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
34. 34.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) sideways (c) up (d) down
35. 35.⚖️ 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
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) turmeric powder (d) a pencil
37. 37.⚖️ 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
38. 38.True or false: a crane uses a pulley. (a) False (b) True
39. 39.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
40. 40.⚖️ 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

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