Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 512 · 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 not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a balloon (d) a pencil
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) turmeric powder (d) a magnet
3. 3.⚖️ 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
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
5. 5.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) the rope gets shorter (d) pulling down is easier
6. 6.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) on the bench (d) in the tap
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a balloon
8. 8.True or false: a well pulley is an inclined plane. (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 change it (c) we keep it the same
10. 10.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
11. 11.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
12. 12.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
13. 13.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
14. 14.True or false: a crane is an inclined plane. (a) False (b) True
15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a small paper cup (d) a mirror
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a small paper cup (d) turmeric powder
17. 17.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a crowbar (d) a bottle opener
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) a pencil (d) a battery cell
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) how hard we must pull (c) number of pulleys (d) the same cup of coins
22. 22.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
23. 23.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a balloon (d) a mirror
25. 25.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) yeast
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) False (b) True
31. 31.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
32. 32.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.⚖️ 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
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚙️ Which of these is a lever? (a) a see-saw (b) a crane (c) a well pulley (d) a ramp
36. 36.True or false: a steering wheel uses a pulley. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) string (d) turmeric powder
38. 38.🏗️ 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
39. 39.True or false: a bottle opener uses a pulley. (a) False (b) True
40. 40.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True

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