Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 744 · 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? True or false: the same string is the one thing we change. (a) True (b) False
2. 2.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
5. 5.⚖️ 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) number of pulleys (c) the same cup of coins
6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
7. 7.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) changes pull direction (d) adds weight
8. 8.🔮 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
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
10. 10.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) a balloon (d) string
12. 12.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a crowbar (d) a spoon lifting a lid
13. 13.⚖️ 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
14. 14.True or false: a steering wheel is a wheel and axle. (a) True (b) False
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a magnet (d) a balloon
16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a mirror (d) a small paper cup
17. 17.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
18. 18.⚙️ Which of these uses a pulley? (a) a doorknob (b) a ramp (c) a tap handle (d) a crane
19. 19.⚖️ 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 keep it the same (b) we measure it (c) we change it
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a battery cell (c) a pencil (d) an empty thread reel
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
22. 22.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
23. 23.True or false: an empty thread reel is not 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) string (b) a small paper cup (c) a pencil (d) a battery cell
25. 25.⚖️ 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
26. 26.⚖️ 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
27. 27.True or false: a doorknob is an inclined plane. (a) False (b) True
28. 28.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
29. 29.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a steering wheel (c) a spoon lifting a lid (d) a slide
30. 30.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a mirror (d) coins as the load
32. 32.🧺 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) turmeric powder (d) a pencil
33. 33.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) yeast (d) an empty thread reel
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) coins as the load
36. 36.True or false: a see-saw uses a pulley. (a) True (b) False
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a balloon
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
40. 40.True or false: a slide is an inclined plane. (a) True (b) False

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