Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 430 · 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) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a battery cell (d) a small paper cup
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
7. 7.⚖️ 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 change it (b) we measure it (c) we keep it the same
8. 8.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
9. 9.True or false: a slide is a lever. (a) False (b) True
10. 10.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
11. 11.⚖️ 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) number of pulleys (c) the same string (d) the lifting height
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
13. 13.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a magnet (d) a mirror
15. 15.⚙️ Which of these uses a pulley? (a) a see-saw (b) a bottle opener (c) a flagpole (d) a doorknob
16. 16.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a crane (d) a sloping road
17. 17.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
18. 18.True or false: a see-saw is an inclined plane. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) a magnet (d) an empty thread reel
21. 21.True or false: a well pulley is a lever. (a) False (b) True
22. 22.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a crane (c) a bottle opener (d) a doorknob
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) coins as the load (d) a mirror
24. 24.⚖️ 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) the same cup of coins (c) the same string (d) the lifting height
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) coins as the load (d) string
26. 26.⚖️ 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
27. 27.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
29. 29.🧺 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) yeast
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) string
31. 31.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
32. 32.⚖️ 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 change it (b) we measure it (c) we keep it the same
33. 33.⚖️ 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
34. 34.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
35. 35.True or false: a slide is an inclined plane. (a) True (b) False
36. 36.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
37. 37.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed

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