Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 914 · 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 “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: a bottle opener uses a pulley. (a) False (b) True
3. 3.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
5. 5.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) battery (c) rope (d) nail
6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) coins as the load (d) a magnet
7. 7.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
10. 10.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
11. 11.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) a small paper cup
13. 13.⚙️ Which of these uses a pulley? (a) a crowbar (b) a tap handle (c) a slide (d) a crane
14. 14.True or false: a ramp uses a pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
17. 17.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it gets hot (d) it could fall on you
18. 18.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) string
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a pencil (d) turmeric powder
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a small paper cup (c) coins as the load (d) turmeric powder
22. 22.True or false: a spoon lifting a lid is a lever. (a) True (b) False
23. 23.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
24. 24.⚖️ 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 measure it (c) we keep it the same
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a battery cell (d) coins as the load
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) turmeric powder (c) a balloon (d) a small paper cup
28. 28.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
29. 29.⚖️ 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) False (b) True
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) an empty thread reel (d) turmeric powder
32. 32.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 5 cm (d) 40 cm
33. 33.True or false: a tap handle is a lever. (a) False (b) True
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) an empty thread reel (d) a mirror
35. 35.🏗️ 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
36. 36.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) a pencil (c) an empty thread reel (d) string
38. 38.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
39. 39.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
40. 40.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier

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