Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 230 · 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 pencil for the thread-reel pulley? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a pencil (d) a battery cell
3. 3.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
4. 4.True or false: a sloping road is an inclined plane. (a) False (b) True
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) yeast (d) an empty thread reel
6. 6.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
7. 7.⚖️ 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 measure it (c) we keep it the same
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) coins as the load
9. 9.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) a magnet (d) an empty thread reel
10. 10.⚖️ 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) how hard we must pull (c) number of pulleys (d) the lifting height
11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
12. 12.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
13. 13.🏗️ 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
14. 14.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) yeast (d) string
16. 16.⚙️ Which of these uses a pulley? (a) a crowbar (b) a ramp (c) a flagpole (d) a see-saw
17. 17.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a crane (d) a see-saw
18. 18.⚖️ 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 keep it the same (c) we measure it
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
20. 20.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a well pulley (c) a bottle opener (d) a crowbar
21. 21.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
22. 22.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
23. 23.True or false: a bottle opener is a lever. (a) False (b) True
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
25. 25.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) changes pull direction (d) adds weight
26. 26.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
27. 27.True or false: string is needed for the thread-reel pulley. (a) False (b) True
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) string (d) coins as the load
29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
30. 30.True or false: a crane uses a pulley. (a) True (b) False
31. 31.True or false: a tap handle is a wheel and axle. (a) False (b) True
32. 32.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) up (d) down
33. 33.⚖️ 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
34. 34.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a tap handle (b) a sloping road (c) a ramp (d) a bottle opener
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
37. 37.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
38. 38.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) coins as the load (c) an empty thread reel (d) a pencil
40. 40.⚖️ 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

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