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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 175 · 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.True or false: a slide is an inclined plane. (a) False (b) True
  2. 2.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  3. 3.⚖️ 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) how hard we must pull (d) the lifting height
  4. 4.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) coins as the load (c) an empty thread reel (d) a small paper cup
  6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) impossible (d) the same
  7. 7.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
  8. 8.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a ramp (d) a crane
  9. 9.⚖️ 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
  10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) sideways (d) in a circle
  11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
  12. 12.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  13. 13.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a flagpole (d) a bottle opener
  14. 14.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
  15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) an empty thread reel (c) a pencil (d) a small paper cup
  16. 16.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
  17. 17.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
  18. 18.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) an empty thread reel (d) a magnet
  19. 19.True or false: a slide is a wheel and axle. (a) False (b) True
  20. 20.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) an empty thread reel (d) string
  21. 21.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) the same string (d) number of pulleys
  23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
  24. 24.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it turns blue (c) it gets longer (d) it can hurt your finger
  25. 25.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) on the bench (d) in the tap
  26. 26.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
  27. 27.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  28. 28.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  29. 29.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
  30. 30.True or false: a crowbar is a lever. (a) True (b) False
  31. 31.⚖️ 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
  32. 32.True or false: a crowbar uses a pulley. (a) False (b) True
  33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
  34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) an empty thread reel (d) coins as the load
  35. 35.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
  36. 36.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
  38. 38.True or false: a sloping road is an inclined plane. (a) False (b) True
  39. 39.⚖️ 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
  40. 40.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False

Answer key

  1. True
  2. needed
  3. how hard we must pull
  4. needed
  5. a balloon
  6. harder
  7. not needed
  8. a crane
  9. the same string
  10. down
  11. about half
  12. a pulley
  13. a bottle opener
  14. False
  15. a mirror
  16. True
  17. True
  18. a magnet
  19. False
  20. a mirror
  21. not needed
  22. number of pulleys
  23. the same cup of coins
  24. it can hurt your finger
  25. on the flagpole
  26. rope
  27. True
  28. not needed
  29. True
  30. True
  31. we keep it the same
  32. False
  33. False
  34. a magnet
  35. 20 cm
  36. a lever
  37. True
  38. True
  39. True
  40. True

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