Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 470 · 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: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
2. 2.⚖️ 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
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a balloon (c) a pencil (d) a small paper cup
4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
5. 5.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
6. 6.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
7. 7.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a tap handle (d) a bottle opener
8. 8.⚖️ 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
9. 9.⚖️ 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 change it (c) we keep it the same
10. 10.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
11. 11.🧺 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) string (d) a balloon
12. 12.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
13. 13.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
15. 15.🧺 Do we need a small paper cup 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? What do we do with “the same cup of coins”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
19. 19.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a bottle opener (d) a tap handle
20. 20.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) an empty thread reel
22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) how hard we must pull (c) number of pulleys
24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) an empty thread reel (d) coins as the load
26. 26.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
27. 27.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a bottle opener (d) a crane
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a small paper cup (d) coins as the load
30. 30.True or false: a doorknob uses a pulley. (a) True (b) False
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a small paper cup (d) a magnet
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) turmeric powder (d) a small paper cup
35. 35.⚖️ 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 measure it (c) we change it
36. 36.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a steering wheel (c) a ramp (d) a bottle opener
37. 37.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a battery cell (d) a magnet
39. 39.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed

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