Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 460 · 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? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the lifting height (d) number of pulleys
2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a mirror (c) a pencil (d) turmeric powder
3. 3.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it gets hot (d) it might sing
4. 4.⚖️ 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
5. 5.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) an empty thread reel (c) a mirror (d) a small paper cup
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) an empty thread reel (d) coins as the load
9. 9.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a ramp (c) a spoon lifting a lid (d) a tap handle
10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
11. 11.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
12. 12.⚖️ 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) False (b) True
13. 13.True or false: a flagpole is a wheel and axle. (a) True (b) False
14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the blackboard (d) on the flagpole
15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a battery cell (c) coins as the load (d) a magnet
16. 16.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
17. 17.⚖️ 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) the same cup of coins (d) number of pulleys
18. 18.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
19. 19.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a crowbar (d) a spoon lifting a lid
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a pencil (d) a magnet
22. 22.True or false: a slide is a wheel and axle. (a) False (b) True
23. 23.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a battery cell (d) an empty thread reel
25. 25.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
26. 26.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) yeast (c) string (d) an empty thread reel
28. 28.True or false: a ramp is an inclined plane. (a) False (b) True
29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) down (c) in a circle (d) up
30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) string (d) yeast
31. 31.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
32. 32.⚖️ 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
33. 33.True or false: a doorknob uses a pulley. (a) True (b) False
34. 34.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) True (b) False
36. 36.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
38. 38.True or false: a spoon lifting a lid is a lever. (a) True (b) False
39. 39.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚖️ 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 string (c) how hard we must pull

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