Pulley STEM Project Worksheet

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

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