Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 827 · 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 not wrap the string around your finger? (a) it gets wet (b) it gets longer (c) it can hurt your finger (d) it turns blue
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
3. 3.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
7. 7.⚖️ 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
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
9. 9.True or false: a ramp uses a pulley. (a) False (b) True
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
11. 11.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ 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
13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) a small paper cup (d) a balloon
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
15. 15.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
19. 19.⚖️ 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
20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
21. 21.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
23. 23.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) string (d) a pencil
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a small paper cup
27. 27.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) nail (c) battery (d) magnet
28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) yeast (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) True (b) False
30. 30.⚙️ Which of these is a lever? (a) a slide (b) a ramp (c) a sloping road (d) a see-saw
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) yeast (c) a balloon (d) a battery cell
33. 33.True or false: a see-saw uses a pulley. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: a well pulley uses a 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 “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
38. 38.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a balloon (d) a pencil
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True

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