Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 561 · 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.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) nail (c) magnet (d) rope
2. 2.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a doorknob (d) a bottle opener
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a mirror
4. 4.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
6. 6.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) a balloon
8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a balloon (c) turmeric powder (d) a magnet
9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a magnet (d) a mirror
10. 10.⚖️ 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
11. 11.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ 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) the same string (c) the lifting height (d) number of pulleys
16. 16.⚖️ 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) the lifting height (c) number of pulleys
17. 17.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) string (d) an empty thread reel
19. 19.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) an empty thread reel (d) yeast
20. 20.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it gets hot (d) it might sing
21. 21.True or false: a ramp is an inclined plane. (a) False (b) True
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) coins as the load
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) string (d) an empty thread reel
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) coins as the load (d) a small paper cup
25. 25.⚖️ 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
26. 26.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a ramp (d) a flagpole
27. 27.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
28. 28.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a slide (d) a flagpole
29. 29.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) a small paper cup (d) string
31. 31.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
32. 32.⚖️ 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
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) pulling down is easier (c) the bucket floats (d) the rope gets shorter
34. 34.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
37. 37.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
38. 38.True or false: a doorknob is an inclined plane. (a) False (b) True
39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) a mirror (d) a magnet
40. 40.True or false: string is needed for the thread-reel pulley. (a) False (b) True

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