Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 909 · 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 same cup of coins (b) how hard we must pull (c) the lifting height (d) number of pulleys
2. 2.⚖️ 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 keep it the same (c) we measure it
3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
4. 4.True or false: string is needed for the thread-reel pulley. (a) True (b) False
5. 5.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a small paper cup (d) yeast
7. 7.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
8. 8.True or false: a flagpole uses a pulley. (a) False (b) True
9. 9.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
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 measure it (b) we keep it the same (c) we change it
13. 13.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
14. 14.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
15. 15.⚖️ 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
16. 16.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
17. 17.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) a magnet (d) turmeric powder
19. 19.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
20. 20.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a mirror
22. 22.⚖️ 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 keep it the same (c) we measure it
23. 23.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a pencil (d) string
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) an empty thread reel (c) a small paper cup (d) string
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a battery cell (d) a magnet
27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
28. 28.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) an empty thread reel (d) a balloon
30. 30.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
31. 31.⚖️ 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
32. 32.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
33. 33.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
34. 34.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
35. 35.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
36. 36.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚖️ 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) number of pulleys (c) how hard we must pull
39. 39.True or false: a ramp is an inclined plane. (a) True (b) False
40. 40.True or false: a tap handle is a wheel and axle. (a) False (b) True

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