Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 263 · 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 what we measure? (a) number of pulleys (b) how hard we must pull (c) the lifting height (d) the same string
2. 2.True or false: a doorknob is a wheel and axle. (a) True (b) False
3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) yeast (d) an empty thread reel
5. 5.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) the same string (d) number of pulleys
7. 7.⚖️ 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 lifting height (c) number of pulleys
8. 8.⚖️ 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
9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
10. 10.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
11. 11.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) coins as the load
13. 13.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
14. 14.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
15. 15.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
16. 16.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
17. 17.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚙️ Which of these is an inclined plane? (a) a crane (b) a doorknob (c) a sloping road (d) a see-saw
19. 19.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a doorknob (c) a ramp (d) a steering wheel
20. 20.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
21. 21.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
22. 22.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a tap handle (d) a see-saw
23. 23.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
24. 24.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
25. 25.⚙️ Which of these is a lever? (a) a bottle opener (b) a steering wheel (c) a ramp (d) a crane
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
27. 27.True or false: a see-saw is a lever. (a) True (b) False
28. 28.True or false: a crowbar uses a pulley. (a) False (b) True
29. 29.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
32. 32.🧺 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) yeast (d) a pencil
33. 33.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) turmeric powder (d) yeast
35. 35.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) a mirror
40. 40.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane

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