Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 832 · 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.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
2. 2.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a balloon (d) coins as the load
4. 4.True or false: a steering wheel is a wheel and axle. (a) False (b) True
5. 5.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
6. 6.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a small paper cup (c) an empty thread reel (d) string
8. 8.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a slide (c) a well pulley (d) a tap handle
9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a balloon (d) string
12. 12.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
13. 13.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
14. 14.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) a small paper cup (d) a magnet
16. 16.🔮 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
17. 17.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
18. 18.⚖️ 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 string
19. 19.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a well pulley (d) a tap handle
20. 20.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) a mirror
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
23. 23.True or false: string is needed for the thread-reel pulley. (a) True (b) False
24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) a mirror
25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
27. 27.⚖️ 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
28. 28.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
29. 29.True or false: a steering wheel is an inclined plane. (a) False (b) True
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 keep it the same (c) we measure it
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) coins as the load (d) a magnet
32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) yeast (d) a battery cell
34. 34.⚖️ 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
35. 35.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
36. 36.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
37. 37.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
38. 38.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
39. 39.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) yeast (c) an empty thread reel (d) coins as the load

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