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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 870 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a magnet (c) a pencil (d) a small paper cup
  2. 2.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) zero (c) about half (d) the same
  3. 3.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
  5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it turns blue (d) it gets wet
  6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) turmeric powder (d) a magnet
  7. 7.⚙️ Which of these uses a pulley? (a) a slide (b) a see-saw (c) a doorknob (d) a well pulley
  8. 8.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  9. 9.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
  10. 10.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
  11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
  12. 12.True or false: a crowbar uses a pulley. (a) True (b) False
  13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a pencil (c) a balloon (d) an empty thread reel
  14. 14.⚖️ 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
  15. 15.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
  16. 16.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
  17. 17.True or false: a bottle opener is a lever. (a) False (b) True
  18. 18.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
  19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
  20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) string (c) coins as the load (d) a mirror
  21. 21.🧺 Do we need string 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? What do we do with “the lifting height”? (a) we measure it (b) we change it (c) we keep it the same
  23. 23.⚖️ 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 string (c) number of pulleys
  24. 24.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  25. 25.⚖️ 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
  26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
  27. 27.True or false: a steering wheel is a lever. (a) False (b) True
  28. 28.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
  29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the lifting height (c) the same cup of coins (d) the same string
  30. 30.True or false: a mirror is needed for the thread-reel pulley. (a) False (b) True
  31. 31.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
  32. 32.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
  33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a magnet (c) an empty thread reel (d) a pencil
  34. 34.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it is magnetic (d) it could fall on you
  35. 35.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  36. 36.True or false: a crowbar is a lever. (a) False (b) True
  37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a mirror (c) a pencil (d) a small paper cup
  38. 38.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) how hard we must pull (b) the lifting height (c) number of pulleys (d) the same string
  40. 40.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a spoon lifting a lid (d) a crowbar

Answer key

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

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