Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 612 · 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.⚖️ 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) number of pulleys (c) the same string (d) the same cup of coins
2. 2.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) the bucket floats (d) pulling down is easier
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) string
4. 4.⚖️ 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) number of pulleys (c) the same cup of coins (d) the same string
5. 5.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
6. 6.⚙️ Which of these is a wheel and axle? (a) a crane (b) a steering wheel (c) a slide (d) a flagpole
7. 7.⚖️ 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
8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) the same (d) double
9. 9.🏗️ 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
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same string
11. 11.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
12. 12.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a small paper cup (d) a balloon
14. 14.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
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 keep it the same (b) we change it (c) we measure it
16. 16.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
18. 18.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
19. 19.True or false: a bottle opener is a wheel and axle. (a) True (b) False
20. 20.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a bottle opener
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
23. 23.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
27. 27.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a doorknob (d) a crowbar
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) a balloon (d) a pencil
29. 29.⚖️ 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
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a battery cell (d) a balloon
31. 31.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a crowbar (d) a flagpole
32. 32.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a steering wheel uses a pulley. (a) False (b) True
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) yeast (d) an empty thread reel
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
39. 39.True or false: a doorknob uses a pulley. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a battery cell (d) a pencil

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