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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 216 · 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.🧺 Which of these is not needed for the thread-reel pulley? (a) yeast (b) a pencil (c) an empty thread reel (d) coins as the load
  2. 2.True or false: a crane is an inclined plane. (a) True (b) False
  3. 3.True or false: a crane uses a pulley. (a) True (b) False
  4. 4.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
  5. 5.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it turns blue (d) it gets longer
  6. 6.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  7. 7.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
  8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) turmeric powder (d) a pencil
  9. 9.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) turmeric powder (c) a mirror (d) coins as the load
  10. 10.⚖️ 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) the lifting height (c) how hard we must pull (d) number of pulleys
  11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
  12. 12.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
  13. 13.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
  14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) impossible (d) easier
  15. 15.True or false: a steering wheel is a lever. (a) True (b) False
  16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
  17. 17.⚖️ 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) number of pulleys (c) the same cup of coins (d) the same string
  18. 18.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
  19. 19.⚖️ 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
  20. 20.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a bottle opener (d) a flagpole
  21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a small paper cup (c) a battery cell (d) string
  22. 22.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a tap handle (c) a see-saw (d) a sloping road
  23. 23.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a mirror (d) an empty thread reel
  25. 25.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  26. 26.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
  27. 27.True or false: a see-saw is a lever. (a) True (b) False
  28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
  29. 29.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  30. 30.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
  31. 31.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a tap handle (d) a flagpole
  32. 32.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  33. 33.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) halves the weight (c) adds weight (d) changes pull direction
  34. 34.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
  35. 35.⚖️ 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
  36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a pencil (d) an empty thread reel
  37. 37.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
  38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  39. 39.True or false: string is needed for the thread-reel pulley. (a) True (b) False
  40. 40.⚙️ Which of these is an inclined plane? (a) a ramp (b) a crane (c) a steering wheel (d) a flagpole

Answer key

  1. yeast
  2. False
  3. True
  4. an inclined plane
  5. it can hurt your finger
  6. not needed
  7. True
  8. a pencil
  9. coins as the load
  10. how hard we must pull
  11. we measure it
  12. True
  13. False
  14. harder
  15. False
  16. 20 cm
  17. number of pulleys
  18. it could fall on you
  19. False
  20. a slide
  21. a battery cell
  22. a tap handle
  23. True
  24. a mirror
  25. a lever
  26. True
  27. True
  28. we keep it the same
  29. needed
  30. a pulley
  31. a crowbar
  32. needed
  33. changes pull direction
  34. not needed
  35. the same string
  36. a balloon
  37. True
  38. not needed
  39. True
  40. a ramp

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