Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 74 · 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 never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it is magnetic (d) it gets hot
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
3. 3.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) about half (d) zero
4. 4.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) an empty thread reel (d) a balloon
5. 5.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
6. 6.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a flagpole (d) a bottle opener
7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
8. 8.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a well pulley (c) a ramp (d) a crane
9. 9.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
10. 10.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
11. 11.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) turmeric powder (d) a pencil
12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) string (d) a mirror
13. 13.⚖️ 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 keep it the same (c) we change it
14. 14.True or false: a see-saw uses a pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
16. 16.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
17. 17.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
18. 18.True or false: a crowbar is a lever. (a) False (b) True
19. 19.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a balloon (c) an empty thread reel (d) coins as the load
21. 21.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
22. 22.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
23. 23.⚖️ 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 measure it (c) we change it
24. 24.True or false: a sloping road is a wheel and axle. (a) True (b) False
25. 25.True or false: a crowbar is an inclined plane. (a) False (b) True
26. 26.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
28. 28.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
29. 29.⚖️ 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
30. 30.⚖️ 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) True (b) False
31. 31.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) in the tap (c) on the bench (d) on the blackboard
32. 32.🏗️ 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
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
34. 34.True or false: a tap handle is a wheel and axle. (a) True (b) False
35. 35.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
36. 36.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crane (c) a tap handle (d) a slide
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) False (b) True
39. 39.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True

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