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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 531 · 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) a pencil (b) a mirror (c) a small paper cup (d) an empty thread reel
  2. 2.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
  3. 3.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  4. 4.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
  5. 5.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
  6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) an empty thread reel (c) a magnet (d) yeast
  7. 7.⚖️ 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) how hard we must pull (c) the same cup of coins (d) number of pulleys
  8. 8.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
  9. 9.True or false: a see-saw uses a pulley. (a) False (b) True
  10. 10.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a crowbar
  11. 11.⚙️ Which of these is a lever? (a) a sloping road (b) a crane (c) a slide (d) a crowbar
  12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) coins as the load (c) a magnet (d) yeast
  13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) turmeric powder (d) a pencil
  14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) coins as the load (c) a magnet (d) a small paper cup
  15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) turmeric powder (d) a small paper cup
  16. 16.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) about half (d) double
  17. 17.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) sideways (d) down
  18. 18.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  19. 19.True or false: a sloping road is an inclined plane. (a) False (b) True
  20. 20.True or false: a crowbar uses a pulley. (a) True (b) False
  21. 21.⚖️ 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 keep it the same (c) we measure it
  22. 22.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  23. 23.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) the same (c) easier (d) impossible
  24. 24.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) coins as the load (d) string
  26. 26.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
  27. 27.⚙️ Which of these is an inclined plane? (a) a crane (b) a sloping road (c) a crowbar (d) a tap handle
  28. 28.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a sloping road (d) a bottle opener
  29. 29.True or false: a tap handle is an inclined plane. (a) True (b) False
  30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) an empty thread reel (c) a small paper cup (d) a pencil
  31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
  32. 32.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  33. 33.True or false: a ramp is an inclined plane. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we measure it (c) we change it
  36. 36.True or false: a sloping road is a wheel and axle. (a) False (b) True
  37. 37.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
  38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
  39. 39.True or false: a well pulley is a wheel and axle. (a) True (b) False
  40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) string (b) yeast (c) a balloon (d) a battery cell

Answer key

  1. a mirror
  2. it could fall on you
  3. a pulley
  4. False
  5. needed
  6. an empty thread reel
  7. number of pulleys
  8. it can hurt your finger
  9. False
  10. a ramp
  11. a crowbar
  12. coins as the load
  13. a pencil
  14. a magnet
  15. turmeric powder
  16. about half
  17. down
  18. True
  19. True
  20. False
  21. we keep it the same
  22. needed
  23. harder
  24. not needed
  25. turmeric powder
  26. 20 cm
  27. a sloping road
  28. a bottle opener
  29. False
  30. a mirror
  31. False
  32. not needed
  33. True
  34. True
  35. we measure it
  36. False
  37. not needed
  38. False
  39. False
  40. string

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