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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 838 · 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.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
  2. 2.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  3. 3.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
  4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) turmeric powder (d) a small paper cup
  5. 5.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
  6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) True (b) False
  7. 7.True or false: a crowbar is a wheel and axle. (a) True (b) False
  8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) a small paper cup
  9. 9.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  10. 10.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a small paper cup (d) yeast
  11. 11.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crane (d) a steering wheel
  12. 12.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
  13. 13.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
  14. 14.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) a small paper cup (d) coins as the load
  15. 15.True or false: a bottle opener is an inclined plane. (a) False (b) True
  16. 16.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
  17. 17.True or false: a doorknob is a lever. (a) False (b) True
  18. 18.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
  19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) True (b) False
  20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
  21. 21.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
  22. 22.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
  23. 23.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
  24. 24.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
  25. 25.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
  26. 26.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  27. 27.🧺 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 balloon (d) an empty thread reel
  28. 28.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
  29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
  30. 30.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) a pencil (d) a balloon
  31. 31.⚙️ Which simple machine is a doorknob? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
  32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) a mirror (d) a small paper cup
  33. 33.True or false: a see-saw is a lever. (a) False (b) True
  34. 34.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
  35. 35.⚖️ 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
  36. 36.⚖️ 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
  37. 37.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  38. 38.⚖️ 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 lifting height (d) the same string
  39. 39.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
  40. 40.True or false: string is not needed for the thread-reel pulley. (a) True (b) False

Answer key

  1. needed
  2. not needed
  3. a pulley
  4. turmeric powder
  5. False
  6. False
  7. False
  8. yeast
  9. True
  10. yeast
  11. a sloping road
  12. False
  13. it can hurt your finger
  14. a magnet
  15. False
  16. it could fall on you
  17. False
  18. needed
  19. True
  20. we keep it the same
  21. False
  22. not needed
  23. False
  24. True
  25. not needed
  26. True
  27. a balloon
  28. not needed
  29. we keep it the same
  30. a balloon
  31. a wheel and axle
  32. a mirror
  33. True
  34. how hard we must pull
  35. True
  36. we measure it
  37. needed
  38. number of pulleys
  39. False
  40. False

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