Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 661 · 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: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
2. 2.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) an empty thread reel (d) a magnet
4. 4.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
5. 5.⚖️ 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
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) string (d) a pencil
7. 7.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
8. 8.⚖️ 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
9. 9.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
10. 10.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
11. 11.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
12. 12.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) the rope gets shorter (d) water gets lighter
13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) a balloon (d) turmeric powder
14. 14.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a slide (d) a see-saw
15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins (d) the same string
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 same string (b) number of pulleys (c) the lifting height (d) the same cup of coins
17. 17.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) yeast (d) string
19. 19.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
20. 20.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a mirror (d) coins as the load
22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 20 cm (d) 10 cm
23. 23.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) an empty thread reel (c) a small paper cup (d) string
24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
25. 25.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
26. 26.⚙️ Which of these uses a pulley? (a) a tap handle (b) a ramp (c) a crowbar (d) a flagpole
27. 27.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a balloon (c) coins as the load (d) turmeric powder
28. 28.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
30. 30.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
31. 31.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.⚖️ 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
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) a balloon (d) yeast
36. 36.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
37. 37.⚖️ 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
38. 38.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
39. 39.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
40. 40.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half

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