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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 440 · 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.⚖️ 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) the same cup of coins (c) number of pulleys
  2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) coins as the load (c) a battery cell (d) an empty thread reel
  3. 3.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  4. 4.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  5. 5.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) changes pull direction (d) makes it magnetic
  6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  7. 7.⚖️ 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
  8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) string (d) coins as the load
  9. 9.True or false: a see-saw is a lever. (a) False (b) True
  10. 10.True or false: a slide is a wheel and axle. (a) True (b) False
  11. 11.🏗️ 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
  12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
  13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  14. 14.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
  15. 15.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a small paper cup (c) coins as the load (d) a pencil
  16. 16.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) in the tap (c) on the bench (d) on the flagpole
  17. 17.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  18. 18.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  19. 19.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
  20. 20.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
  21. 21.⚖️ 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
  22. 22.⚖️ 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
  23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) number of pulleys (c) the lifting height (d) how hard we must pull
  24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
  25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) coins as the load (c) turmeric powder (d) a mirror
  26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a balloon (c) a small paper cup (d) coins as the load
  27. 27.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a well pulley (d) a flagpole
  28. 28.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  29. 29.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
  30. 30.⚖️ 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
  31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a mirror (d) string
  32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a balloon (c) a small paper cup (d) string
  33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a magnet (c) string (d) a pencil
  34. 34.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
  35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a tap handle (c) a sloping road (d) a see-saw
  36. 36.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a well pulley (c) a steering wheel (d) a see-saw
  37. 37.True or false: a crowbar uses a pulley. (a) False (b) True
  38. 38.True or false: a slide uses a pulley. (a) False (b) True
  39. 39.True or false: a doorknob is a wheel and axle. (a) False (b) True
  40. 40.True or false: a crowbar is a lever. (a) False (b) True

Answer key

  1. the same cup of coins
  2. a battery cell
  3. not needed
  4. a lever
  5. changes pull direction
  6. True
  7. we keep it the same
  8. a mirror
  9. True
  10. False
  11. down
  12. we keep it the same
  13. True
  14. True
  15. a magnet
  16. on the flagpole
  17. a lever
  18. not needed
  19. False
  20. needed
  21. we keep it the same
  22. True
  23. how hard we must pull
  24. False
  25. coins as the load
  26. a balloon
  27. a crowbar
  28. needed
  29. about half
  30. False
  31. a mirror
  32. a balloon
  33. a magnet
  34. not needed
  35. a see-saw
  36. a sloping road
  37. False
  38. False
  39. True
  40. True

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