Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 984 · 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.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
3. 3.True or false: a crowbar uses a pulley. (a) True (b) False
4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) a battery cell
5. 5.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it is magnetic (d) it might sing
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) yeast (c) a balloon (d) a pencil
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) string (d) coins as the load
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
9. 9.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a well pulley (d) a doorknob
10. 10.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
11. 11.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) number of pulleys (c) the same cup of coins (d) how hard we must pull
13. 13.True or false: a well pulley is a wheel and axle. (a) False (b) True
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the same cup of coins (c) number of pulleys (d) the lifting height
15. 15.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull
17. 17.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) a magnet
18. 18.⚙️ Which of these uses a pulley? (a) a tap handle (b) a doorknob (c) a crowbar (d) a well pulley
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the rope gets shorter (c) the bucket floats (d) pulling down is easier
22. 22.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a sloping road (d) a well pulley
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) turmeric powder
24. 24.⚙️ Which of these is a lever? (a) a sloping road (b) a ramp (c) a flagpole (d) a crowbar
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a mirror (d) a magnet
27. 27.True or false: a bottle opener is a wheel and axle. (a) True (b) False
28. 28.True or false: string is needed for the thread-reel pulley. (a) True (b) False
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
30. 30.⚖️ 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
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) an empty thread reel (d) a balloon
34. 34.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
35. 35.True or false: a sloping road is a wheel and axle. (a) False (b) True
36. 36.⚙️ Which of these uses a pulley? (a) a sloping road (b) a slide (c) a steering wheel (d) a flagpole
37. 37.True or false: a steering wheel is a wheel and axle. (a) True (b) False
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
39. 39.⚖️ 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
40. 40.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False

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