Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 508 · 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) a small paper cup (b) turmeric powder (c) a battery cell (d) a magnet
2. 2.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
3. 3.⚖️ 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 lifting height (c) the same string (d) number of pulleys
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) turmeric powder (d) string
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) string (c) a pencil (d) an empty thread reel
6. 6.⚙️ Which of these uses a pulley? (a) a sloping road (b) a tap handle (c) a slide (d) a crane
7. 7.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
8. 8.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
10. 10.⚙️ Which of these is a lever? (a) a doorknob (b) a ramp (c) a well pulley (d) a bottle opener
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the flagpole (d) on the bench
12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) yeast (d) an empty thread reel
13. 13.True or false: a steering wheel is a wheel and axle. (a) True (b) False
14. 14.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
15. 15.⚖️ 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 measure it (c) we keep it the same
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a small paper cup (d) a pencil
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) a battery cell (d) coins as the load
18. 18.⚖️ 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) number of pulleys (c) the same cup of coins
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a mirror
20. 20.True or false: string is needed for the thread-reel pulley. (a) True (b) False
21. 21.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) zero (d) the same
22. 22.⚖️ 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 same cup of coins (d) number of pulleys
23. 23.🏗️ 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
24. 24.⚖️ 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 string (c) number of pulleys
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
26. 26.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) a pencil (d) string
28. 28.True or false: a slide is an inclined plane. (a) True (b) False
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a flagpole (c) a steering wheel (d) a bottle opener
31. 31.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a magnet (d) yeast
34. 34.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a crane (d) a slide
35. 35.⚖️ 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
36. 36.True or false: a well pulley is a wheel and axle. (a) False (b) True
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) True (b) False
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
39. 39.True or false: a doorknob is a wheel and axle. (a) False (b) True
40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a battery cell (d) an empty thread reel

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