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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 632 · 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.

NameDateTime takenScore ___ / 40
  1. 1.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
  2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) False (b) True
  3. 3.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
  4. 4.⚙️ Which of these is a lever? (a) a well pulley (b) a slide (c) a crowbar (d) a crane
  5. 5.True or false: a crowbar is a wheel and axle. (a) False (b) True
  6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) an empty thread reel (d) string
  7. 7.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a slide (d) a see-saw
  8. 8.🛟 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
  9. 9.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a see-saw (d) a tap handle
  10. 10.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
  11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) in the tap (d) on the flagpole
  12. 12.⚖️ 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 change it (b) we keep it the same (c) we measure it
  13. 13.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  14. 14.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) the same (d) impossible
  16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) string (c) a magnet (d) a battery cell
  17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
  18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
  19. 19.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
  20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) an empty thread reel (c) a pencil (d) a small paper cup
  21. 21.True or false: a well pulley is a wheel and axle. (a) False (b) True
  22. 22.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
  23. 23.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  24. 24.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a doorknob (d) a tap handle
  25. 25.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) halves the weight (d) changes pull direction
  26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) yeast (d) a pencil
  27. 27.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) a balloon (d) an empty thread reel
  28. 28.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
  29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) about half (d) double
  30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
  31. 31.⚖️ 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 lifting height
  32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) turmeric powder (d) an empty thread reel
  33. 33.⚖️ 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 change it (c) we keep it the same
  34. 34.🧺 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 small paper cup (d) a mirror
  35. 35.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
  36. 36.True or false: a doorknob uses a pulley. (a) False (b) True
  37. 37.⚖️ 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
  38. 38.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
  39. 39.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
  40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a balloon (d) turmeric powder

Answer key

  1. a lever
  2. False
  3. a lever
  4. a crowbar
  5. False
  6. a mirror
  7. a tap handle
  8. it could fall on you
  9. a see-saw
  10. True
  11. on the flagpole
  12. we measure it
  13. needed
  14. not needed
  15. harder
  16. string
  17. False
  18. True
  19. needed
  20. yeast
  21. False
  22. True
  23. not needed
  24. a flagpole
  25. changes pull direction
  26. yeast
  27. a balloon
  28. True
  29. about half
  30. not needed
  31. the lifting height
  32. turmeric powder
  33. we keep it the same
  34. a mirror
  35. False
  36. False
  37. True
  38. False
  39. not needed
  40. a pencil

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