Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 352 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) string (c) coins as the load (d) a pencil
2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
3. 3.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
4. 4.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
5. 5.🧺 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) a small paper cup
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the lifting height (d) the same string
8. 8.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
9. 9.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
13. 13.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) turmeric powder (d) yeast
15. 15.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
16. 16.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) turmeric powder (d) coins as the load
19. 19.🧺 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 balloon
20. 20.True or false: a flagpole is a lever. (a) True (b) False
21. 21.True or false: a crowbar is a lever. (a) True (b) False
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) a small paper cup
23. 23.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
24. 24.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a balloon (d) coins as the load
26. 26.⚖️ 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 cup of coins (c) number of pulleys
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a small paper cup (c) a balloon (d) a mirror
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.⚖️ 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 string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
32. 32.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
33. 33.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
34. 34.True or false: a see-saw is a lever. (a) False (b) True
35. 35.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a mirror (d) coins as the load
37. 37.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
38. 38.🧺 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) an empty thread reel
39. 39.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚖️ 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

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