Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 766 · 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 lifting height (b) how hard we must pull (c) the same string (d) number of pulleys
2. 2.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it gets hot (d) it could fall on you
3. 3.True or false: a doorknob is a wheel and axle. (a) False (b) True
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) coins as the load (d) a battery cell
5. 5.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) yeast (d) turmeric powder
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) about half (c) zero (d) double
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) a balloon (d) a pencil
9. 9.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
10. 10.🛟 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
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) a mirror
12. 12.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) coins as the load
14. 14.True or false: a sloping road is a lever. (a) True (b) False
15. 15.True or false: a balloon is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a pencil (c) a mirror (d) a balloon
17. 17.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
19. 19.True or false: a steering wheel uses a pulley. (a) True (b) False
20. 20.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
21. 21.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a balloon (c) an empty thread reel (d) string
23. 23.True or false: a crane is an inclined plane. (a) True (b) False
24. 24.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
25. 25.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
26. 26.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.⚙️ Which of these is a lever? (a) a well pulley (b) a slide (c) a steering wheel (d) a bottle opener
29. 29.True or false: a slide is a lever. (a) False (b) True
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) an empty thread reel (c) a pencil (d) string
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 change it (b) we keep it the same (c) we measure it
32. 32.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.True or false: a slide uses a pulley. (a) False (b) True
35. 35.⚖️ 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
36. 36.⚖️ 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) True (b) False
37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
39. 39.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
40. 40.⚖️ 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

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