Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 667 · 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.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) easier (c) harder (d) the same
2. 2.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) turmeric powder (c) string (d) a balloon
4. 4.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
5. 5.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.⚙️ Which of these is a lever? (a) a see-saw (b) a tap handle (c) a flagpole (d) a ramp
8. 8.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
9. 9.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
10. 10.🧺 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 battery cell (d) string
11. 11.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) a pencil (c) an empty thread reel (d) coins as the load
14. 14.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a crowbar (d) a flagpole
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.True or false: a see-saw uses a pulley. (a) False (b) True
17. 17.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
18. 18.⚖️ 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
19. 19.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
20. 20.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
21. 21.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
22. 22.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
23. 23.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
25. 25.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 5 cm (d) 20 cm
27. 27.True or false: a bottle opener is an inclined plane. (a) False (b) True
28. 28.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
29. 29.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a pencil (c) a mirror (d) string
31. 31.⚖️ 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
32. 32.True or false: a sloping road is an inclined plane. (a) True (b) False
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a small paper cup (d) a balloon
34. 34.⚖️ 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) the same string (c) how hard we must pull (d) the lifting height
35. 35.True or false: a bottle opener uses a pulley. (a) True (b) False
36. 36.⚖️ 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
37. 37.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
39. 39.🧺 Which of these is not needed for the thread-reel pulley? (a) a battery cell (b) string (c) an empty thread reel (d) a small paper cup
40. 40.🇮🇳 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

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