Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 150 · 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.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
2. 2.⚖️ 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
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
4. 4.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a mirror (c) an empty thread reel (d) a magnet
6. 6.⚙️ Which simple machine is a slide? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
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) yeast (d) string
8. 8.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a slide (c) a doorknob (d) a flagpole
9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
10. 10.True or false: a tap handle is an inclined plane. (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 what we measure. (a) False (b) True
12. 12.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a mirror (c) a pencil (d) a small paper cup
15. 15.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a slide (c) a flagpole (d) a doorknob
16. 16.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a mirror (c) an empty thread reel (d) string
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it turns blue (d) it can hurt your finger
21. 21.⚖️ 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 string (b) how hard we must pull (c) the lifting height (d) number of pulleys
22. 22.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a balloon (d) coins as the load
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) yeast (d) a balloon
25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
26. 26.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
27. 27.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) turmeric powder (d) string
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) a magnet (d) turmeric powder
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
33. 33.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a battery cell (d) a pencil
36. 36.⚖️ 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 measure it (b) we keep it the same (c) we change it
37. 37.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) a small paper cup (d) a magnet
39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) a pencil (d) string
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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