Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 22 · 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.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
2. 2.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
3. 3.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) the bucket floats (c) pulling down is easier (d) water gets lighter
4. 4.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a doorknob (d) a well pulley
5. 5.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
8. 8.⚖️ 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) how hard we must pull (c) the same cup of coins (d) the lifting height
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) a small paper cup (d) a pencil
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) an empty thread reel (d) string
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
13. 13.🇮🇳 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
14. 14.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) yeast (d) a pencil
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) the same cup of coins (d) how hard we must pull
17. 17.True or false: string is needed for the thread-reel pulley. (a) True (b) False
18. 18.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a tap handle (d) a spoon lifting a lid
19. 19.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a spoon lifting a lid (c) a slide (d) a doorknob
20. 20.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a balloon (c) string (d) coins as the load
22. 22.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) a pencil (d) a small paper cup
24. 24.⚖️ 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
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) a pencil
26. 26.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a magnet (c) an empty thread reel (d) a balloon
28. 28.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
30. 30.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
33. 33.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
34. 34.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) string (c) a battery cell (d) a balloon
36. 36.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
37. 37.⚖️ 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) False (b) True
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 change it (b) we measure it (c) we keep it the same
39. 39.⚖️ 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) number of pulleys (c) how hard we must pull
40. 40.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down

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