Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 743 · 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 the one thing we change. (a) True (b) False
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) how hard we must pull (c) the lifting height (d) the same string
3. 3.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the blackboard (c) in the tap (d) on the flagpole
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) string (d) coins as the load
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same string (c) how hard we must pull (d) number of pulleys
8. 8.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
9. 9.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) down (d) in a circle
10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) turmeric powder (c) a pencil (d) a balloon
12. 12.⚖️ 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
13. 13.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 40 cm (d) 20 cm
14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) string (d) a mirror
15. 15.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same cup of coins
17. 17.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a sloping road (c) a steering wheel (d) a well pulley
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 keep it the same (b) we measure it (c) we change it
19. 19.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
20. 20.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) the same (c) double (d) zero
21. 21.True or false: a slide is an inclined plane. (a) False (b) True
22. 22.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a crowbar (c) a slide (d) a steering wheel
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a pencil (d) yeast
25. 25.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
26. 26.True or false: a flagpole is a wheel and axle. (a) True (b) False
27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a battery cell (d) a pencil
28. 28.True or false: a see-saw is a lever. (a) True (b) False
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.True or false: a tap handle is an inclined plane. (a) False (b) True
31. 31.🧺 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 mirror (d) a pencil
32. 32.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) an empty thread reel (c) turmeric powder (d) a battery cell
33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a balloon (d) a small paper cup
34. 34.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) easier (c) harder (d) impossible
35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
36. 36.True or false: a doorknob is a wheel and axle. (a) False (b) True
37. 37.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
38. 38.⚖️ 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 change it (c) we measure it
39. 39.True or false: a tap handle uses a pulley. (a) False (b) True
40. 40.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed

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