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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 312 · 40 questions
TalentJR

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.

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

Answer key

  1. False
  2. False
  3. a mirror
  4. not needed
  5. True
  6. needed
  7. True
  8. a wheel and axle
  9. False
  10. how hard we must pull
  11. we change it
  12. a crowbar
  13. we keep it the same
  14. a see-saw
  15. about half
  16. needed
  17. False
  18. a steering wheel
  19. True
  20. False
  21. not needed
  22. False
  23. yeast
  24. an empty thread reel
  25. False
  26. we keep it the same
  27. True
  28. True
  29. harder
  30. needed
  31. False
  32. not needed
  33. True
  34. not needed
  35. it could fall on you
  36. turmeric powder
  37. not needed
  38. a battery cell
  39. False
  40. a sloping road

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