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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 246 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
  2. 2.True or false: a mirror is not 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) an empty thread reel (b) yeast (c) a small paper cup (d) string
  4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a magnet (d) coins as the load
  5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) yeast (c) a mirror (d) string
  6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the same cup of coins
  7. 7.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
  8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) sideways (d) down
  9. 9.True or false: a crowbar is an inclined plane. (a) True (b) False
  10. 10.True or false: a bottle opener uses a pulley. (a) False (b) True
  11. 11.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
  12. 12.True or false: a crane is an inclined plane. (a) False (b) True
  13. 13.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
  14. 14.⚖️ 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 cup of coins
  15. 15.⚖️ 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
  16. 16.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a slide (c) a doorknob (d) a crane
  17. 17.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it could fall on you (d) it is magnetic
  18. 18.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
  19. 19.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a bottle opener (d) a flagpole
  20. 20.⚖️ 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
  21. 21.True or false: a crane uses a pulley. (a) False (b) True
  22. 22.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a magnet (d) a balloon
  23. 23.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a spoon lifting a lid (d) a tap handle
  24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) turmeric powder (d) coins as the load
  25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  26. 26.⚖️ 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
  27. 27.True or false: a well pulley is an inclined plane. (a) True (b) False
  28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) coins as the load (d) a balloon
  29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a balloon (d) an empty thread reel
  30. 30.True or false: a doorknob is a wheel and axle. (a) False (b) True
  31. 31.True or false: a well pulley is a lever. (a) True (b) False
  32. 32.True or false: a crowbar is a lever. (a) True (b) False
  33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) coins as the load (d) a mirror
  34. 34.True or false: a see-saw is a wheel and axle. (a) True (b) False
  35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a battery cell (d) an empty thread reel
  36. 36.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
  37. 37.🏗️ 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
  38. 38.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
  39. 39.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  40. 40.True or false: a flagpole uses a pulley. (a) False (b) True

Answer key

  1. about half
  2. True
  3. yeast
  4. a magnet
  5. string
  6. how hard we must pull
  7. True
  8. down
  9. False
  10. False
  11. a wheel and axle
  12. False
  13. on the flagpole
  14. the same cup of coins
  15. we keep it the same
  16. a crane
  17. it could fall on you
  18. True
  19. a bottle opener
  20. we keep it the same
  21. True
  22. an empty thread reel
  23. a spoon lifting a lid
  24. turmeric powder
  25. needed
  26. True
  27. False
  28. a balloon
  29. a balloon
  30. True
  31. False
  32. True
  33. coins as the load
  34. False
  35. a battery cell
  36. False
  37. pulling down is easier
  38. True
  39. an inclined plane
  40. True

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