Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 457 · 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.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) yeast (d) a pencil
3. 3.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
4. 4.True or false: a sloping road is a wheel and axle. (a) True (b) False
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) how hard we must pull
6. 6.True or false: a crowbar is an inclined plane. (a) True (b) False
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) False (b) True
8. 8.⚖️ 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
9. 9.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
11. 11.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets longer (c) it turns blue (d) it gets wet
12. 12.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) makes it magnetic (d) adds weight
13. 13.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
14. 14.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
15. 15.⚖️ 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
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a balloon
17. 17.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) turmeric powder (c) string (d) a small paper cup
19. 19.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) string (c) yeast (d) a mirror
21. 21.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) a small paper cup (d) a pencil
23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) an empty thread reel (d) string
24. 24.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
25. 25.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
26. 26.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
27. 27.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a steering wheel (d) a sloping road
28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
29. 29.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a crowbar (d) a see-saw
30. 30.🧺 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 magnet (d) coins as the load
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) turmeric powder (d) coins as the load
33. 33.True or false: a crowbar uses a pulley. (a) True (b) False
34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) a balloon (d) a mirror
35. 35.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
36. 36.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
37. 37.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
38. 38.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
39. 39.⚖️ 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
40. 40.⚖️ 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

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