Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 887 · 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? What do we do with “the same cup of coins”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ 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) the same cup of coins (c) the lifting height (d) how hard we must pull
3. 3.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
4. 4.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
5. 5.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) a balloon
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a small paper cup (d) an empty thread reel
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a balloon (c) a pencil (d) a mirror
12. 12.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) yeast (d) string
13. 13.⚖️ 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 measure it (c) we keep it the same
14. 14.🔮 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
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) yeast (d) coins as the load
16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
18. 18.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
19. 19.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
20. 20.⚖️ 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
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.True or false: a doorknob is a wheel and axle. (a) False (b) True
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a magnet
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
27. 27.⚖️ 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
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
29. 29.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a well pulley (d) a crowbar
30. 30.True or false: a doorknob uses a pulley. (a) False (b) True
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) an empty thread reel (d) a magnet
32. 32.🛟 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
33. 33.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
35. 35.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
36. 36.True or false: a see-saw is a lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
38. 38.True or false: a sloping road is a lever. (a) True (b) False
39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
40. 40.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed

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