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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 975 · 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.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) turmeric powder (d) coins as the load
  2. 2.True or false: a tap handle is a wheel and axle. (a) True (b) False
  3. 3.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a balloon (d) an empty thread reel
  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 keep it the same (b) we change it (c) we measure it
  5. 5.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
  7. 7.True or false: a ramp is an inclined plane. (a) False (b) True
  8. 8.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) the rope gets shorter (d) pulling down is easier
  9. 9.⚖️ 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 measure it (b) we change it (c) we keep it the same
  10. 10.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
  11. 11.⚖️ 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 string
  12. 12.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
  13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) a pencil (c) string (d) an empty thread reel
  14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is what we measure. (a) False (b) True
  15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) a balloon
  16. 16.🧺 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
  17. 17.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
  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.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
  20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
  21. 21.True or false: a crowbar is a wheel and axle. (a) True (b) False
  22. 22.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) battery (c) nail (d) magnet
  23. 23.⚖️ 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 keep it the same (c) we change it
  24. 24.🧺 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 magnet (d) a small paper cup
  25. 25.True or false: a flagpole is a lever. (a) True (b) False
  26. 26.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
  27. 27.⚖️ 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 change it (c) we measure it
  28. 28.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
  29. 29.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a bottle opener (d) a sloping road
  30. 30.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  31. 31.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
  32. 32.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
  33. 33.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
  34. 34.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
  35. 35.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
  36. 36.True or false: a see-saw uses a pulley. (a) False (b) True
  37. 37.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a see-saw (c) a sloping road (d) a tap handle
  38. 38.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
  39. 39.True or false: a flagpole uses a pulley. (a) False (b) True
  40. 40.⚖️ 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

Answer key

  1. coins as the load
  2. True
  3. a balloon
  4. we keep it the same
  5. needed
  6. 20 cm
  7. True
  8. pulling down is easier
  9. we keep it the same
  10. about half
  11. the same string
  12. an inclined plane
  13. a mirror
  14. False
  15. a balloon
  16. yeast
  17. harder
  18. a wheel and axle
  19. False
  20. down
  21. False
  22. rope
  23. we keep it the same
  24. a magnet
  25. False
  26. False
  27. we change it
  28. True
  29. a tap handle
  30. not needed
  31. True
  32. False
  33. False
  34. a wheel and axle
  35. needed
  36. False
  37. a sloping road
  38. a pulley
  39. True
  40. True

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