Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 483 · 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.🛟 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
2. 2.⚖️ 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) True (b) False
3. 3.🧺 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) coins as the load
4. 4.True or false: a ramp uses a pulley. (a) True (b) False
5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) how hard we must pull (c) number of pulleys (d) the same string
7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) turmeric powder (d) a small paper cup
8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) in a circle (c) down (d) up
9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) water gets lighter (d) the rope gets shorter
10. 10.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a balloon (d) a small paper cup
12. 12.⚖️ 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
13. 13.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a magnet (c) a pencil (d) a balloon
15. 15.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) adds weight (c) halves the weight (d) makes it magnetic
16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
17. 17.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 20 cm (c) 40 cm (d) 10 cm
19. 19.🧺 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 battery cell (d) string
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 keep it the same (b) we measure it (c) we change it
21. 21.🇮🇳 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
22. 22.🧺 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) a magnet (d) string
23. 23.True or false: a crane uses a pulley. (a) False (b) True
24. 24.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
25. 25.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a bottle opener (c) a crane (d) a slide
26. 26.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
27. 27.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same cup of coins (c) how hard we must pull
29. 29.True or false: a tap handle is a wheel and axle. (a) False (b) True
30. 30.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
31. 31.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
32. 32.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
33. 33.⚖️ 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 measure it (c) we keep it the same
34. 34.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a slide (c) a crane (d) a ramp
35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a flagpole (d) a see-saw
36. 36.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) harder (c) easier (d) the same
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a mirror (c) string (d) a small paper cup
39. 39.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
40. 40.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True

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