Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 753 · 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 lifting height”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) number of pulleys
6. 6.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
7. 7.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 10 cm (d) 40 cm
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
9. 9.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
10. 10.True or false: a slide is a wheel and axle. (a) False (b) True
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) an empty thread reel (d) a small paper cup
12. 12.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
13. 13.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
14. 14.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) a battery cell (d) coins as the load
15. 15.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
16. 16.True or false: a crane is a lever. (a) True (b) False
17. 17.True or false: a crowbar is a lever. (a) True (b) False
18. 18.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
19. 19.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
20. 20.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) makes it magnetic (c) adds weight (d) changes pull direction
21. 21.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
22. 22.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
23. 23.⚖️ 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 lifting height (c) how hard we must pull (d) number of pulleys
24. 24.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) string (d) coins as the load
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) yeast (d) a pencil
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a small paper cup (d) a balloon
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) yeast (d) a pencil
33. 33.True or false: a slide uses a pulley. (a) True (b) False
34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) coins as the load (c) a pencil (d) string
37. 37.⚖️ 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
38. 38.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
40. 40.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same

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