Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 532 · 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 magnet (b) coins as the load (c) an empty thread reel (d) a small paper cup
2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) turmeric powder
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) a mirror (d) a battery cell
4. 4.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) a pencil
6. 6.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
7. 7.True or false: a see-saw is an inclined plane. (a) True (b) False
8. 8.⚖️ 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
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
11. 11.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
12. 12.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
13. 13.True or false: a doorknob is an inclined plane. (a) True (b) False
14. 14.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
15. 15.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
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 measure it (b) we keep it the same (c) we change it
18. 18.⚖️ 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) how hard we must pull (d) the lifting height
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a magnet
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) string
21. 21.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.🧺 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 battery cell
24. 24.⚖️ 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
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) the same cup of coins (c) the same string (d) how hard we must pull
26. 26.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
27. 27.⚖️ 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 keep it the same (c) we change it
28. 28.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
29. 29.True or false: a sloping road is a wheel and axle. (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.True or false: a flagpole uses a pulley. (a) True (b) False
32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a battery cell (d) an empty thread reel
33. 33.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
34. 34.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a flagpole (d) a crowbar
35. 35.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a slide (d) a see-saw
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
37. 37.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
38. 38.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
39. 39.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a mirror (d) a magnet

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