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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 991 · 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.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  2. 2.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
  3. 3.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  4. 4.True or false: a bottle opener is an inclined plane. (a) True (b) False
  5. 5.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  6. 6.⚖️ 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) how hard we must pull (c) the same string
  7. 7.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a pencil (d) yeast
  9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  10. 10.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  12. 12.True or false: a sloping road is an inclined plane. (a) False (b) True
  13. 13.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
  14. 14.True or false: a well pulley is an inclined plane. (a) True (b) False
  15. 15.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a battery cell (d) a mirror
  16. 16.True or false: a crowbar is a lever. (a) False (b) True
  17. 17.⚖️ 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
  18. 18.⚖️ 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
  19. 19.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
  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 measure it (b) we change it (c) we keep it the same
  21. 21.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
  22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) a magnet
  23. 23.True or false: a battery cell is needed for the thread-reel pulley. (a) False (b) True
  24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) how hard we must pull (d) number of pulleys
  25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a magnet (b) a battery cell (c) string (d) a mirror
  26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  27. 27.⚖️ 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
  28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) turmeric powder (c) a balloon (d) a magnet
  29. 29.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
  30. 30.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
  31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
  32. 32.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
  33. 33.True or false: string is needed for the thread-reel pulley. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) coins as the load (d) a balloon
  35. 35.True or false: a crane uses a pulley. (a) False (b) True
  36. 36.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
  37. 37.🧺 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) yeast (d) a pencil
  38. 38.⚙️ Which of these is a lever? (a) a well pulley (b) a see-saw (c) a tap handle (d) a crane
  39. 39.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a well pulley (c) a ramp (d) a bottle opener
  40. 40.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False

Answer key

  1. not needed
  2. False
  3. needed
  4. False
  5. needed
  6. the same string
  7. a lever
  8. yeast
  9. not needed
  10. not needed
  11. a lever
  12. True
  13. changes pull direction
  14. False
  15. coins as the load
  16. True
  17. we measure it
  18. True
  19. needed
  20. we change it
  21. needed
  22. a magnet
  23. False
  24. number of pulleys
  25. string
  26. not needed
  27. True
  28. an empty thread reel
  29. False
  30. about half
  31. pulling down is easier
  32. True
  33. True
  34. a balloon
  35. True
  36. it could fall on you
  37. yeast
  38. a see-saw
  39. a ramp
  40. True

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