Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 180 · 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 needed for the thread-reel pulley? (a) coins as the load (b) turmeric powder (c) a magnet (d) a balloon
2. 2.⚖️ 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) the same cup of coins (c) the lifting height (d) number of pulleys
3. 3.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a well pulley (d) a spoon lifting a lid
4. 4.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
6. 6.True or false: a crowbar is a wheel and axle. (a) True (b) False
7. 7.⚙️ Which of these uses a pulley? (a) a tap handle (b) a see-saw (c) a crane (d) a sloping road
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a mirror (d) a pencil
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) a battery cell (d) a pencil
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) an empty thread reel (d) string
16. 16.⚖️ 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
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
21. 21.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the bench (c) in the tap (d) on the blackboard
22. 22.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
23. 23.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
25. 25.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
26. 26.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys
28. 28.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
29. 29.⚖️ 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
30. 30.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
32. 32.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a sloping road is an inclined plane. (a) False (b) True
35. 35.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
37. 37.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
38. 38.True or false: a crowbar uses a pulley. (a) True (b) False
39. 39.⚙️ Which of these uses a pulley? (a) a tap handle (b) a well pulley (c) a crowbar (d) a doorknob
40. 40.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True

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