Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 755 · 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? True or false: number of pulleys is kept the same. (a) True (b) False
2. 2.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
3. 3.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a flagpole (d) a tap handle
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) turmeric powder (c) a mirror (d) yeast
5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
6. 6.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
7. 7.🛟 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
8. 8.⚖️ 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
9. 9.⚖️ 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 string (c) the lifting height (d) how hard we must pull
10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) coins as the load (c) a small paper cup (d) string
11. 11.True or false: string is needed for the thread-reel pulley. (a) False (b) True
12. 12.⚖️ 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
13. 13.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a ramp (d) a see-saw
14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) a mirror
15. 15.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
16. 16.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
17. 17.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
18. 18.⚖️ 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
19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
20. 20.⚖️ 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
21. 21.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
22. 22.⚙️ Which of these uses a pulley? (a) a sloping road (b) a doorknob (c) a ramp (d) a well pulley
23. 23.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🔮 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
25. 25.True or false: a steering wheel uses a pulley. (a) True (b) False
26. 26.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) on the flagpole (d) in the tap
27. 27.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
28. 28.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a pencil (c) coins as the load (d) string
29. 29.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a magnet (c) coins as the load (d) a small paper cup
30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
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 keep it the same (b) we measure it (c) we change it
32. 32.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
33. 33.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
34. 34.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) how hard we must pull (c) the same cup of coins (d) the same string
36. 36.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) coins as the load (d) a balloon
38. 38.⚖️ 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) True (b) False
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) string (d) coins as the load
40. 40.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True

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