Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 67 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) a small paper cup (d) an empty thread reel
2. 2.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) coins as the load
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) string (d) turmeric powder
5. 5.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) a small paper cup (d) an empty thread reel
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a pencil (d) a magnet
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a balloon (c) a magnet (d) a small paper cup
10. 10.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) yeast
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
13. 13.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
16. 16.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a battery cell
17. 17.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a pencil (d) a balloon
19. 19.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
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 measure it (b) we change it (c) we keep it the same
21. 21.⚖️ 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 measure it (c) we change it
22. 22.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
23. 23.⚖️ 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
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) yeast (d) a mirror
25. 25.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) impossible (d) harder
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
27. 27.True or false: a tap handle is a wheel and axle. (a) False (b) True
28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
29. 29.⚖️ 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
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins
31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) string (d) a battery cell
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) turmeric powder (d) a small paper cup
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) yeast (d) an empty thread reel
35. 35.True or false: a bottle opener is an inclined plane. (a) True (b) False
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) sideways (d) in a circle
37. 37.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
38. 38.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
39. 39.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a see-saw (d) a steering wheel
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) yeast (d) turmeric powder

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