Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 232 · 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? What do we do with “the same cup of coins”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🛟 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
3. 3.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
5. 5.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a well pulley (d) a spoon lifting a lid
6. 6.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
7. 7.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) string (c) a mirror (d) a magnet
8. 8.⚖️ 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
9. 9.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a battery cell
11. 11.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
12. 12.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a mirror (d) a battery cell
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a small paper cup (d) string
15. 15.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
16. 16.True or false: string is needed for the thread-reel pulley. (a) False (b) True
17. 17.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) magnet (c) battery (d) rope
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.True or false: a tap handle is an inclined plane. (a) True (b) False
20. 20.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) a pencil (d) string
22. 22.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
25. 25.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crane (d) a tap handle
26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) a magnet
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) coins as the load
28. 28.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
29. 29.🛟 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
30. 30.⚖️ 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
31. 31.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
32. 32.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
33. 33.True or false: a ramp is a lever. (a) True (b) False
34. 34.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
35. 35.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
36. 36.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
37. 37.⚙️ Which of these is a lever? (a) a flagpole (b) a slide (c) a see-saw (d) a crane
38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) impossible (d) easier
39. 39.True or false: a tap handle is a lever. (a) True (b) False
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) turmeric powder (d) a battery cell

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