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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 813 · 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 crowbar uses a pulley. (a) False (b) True
  2. 2.True or false: a well pulley is an inclined plane. (a) False (b) True
  3. 3.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  4. 4.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
  5. 5.True or false: a steering wheel uses a pulley. (a) True (b) False
  6. 6.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) an empty thread reel (d) yeast
  7. 7.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) yeast (d) a small paper cup
  8. 8.⚙️ Which simple machine is a tap handle? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) an empty thread reel (d) a pencil
  10. 10.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
  11. 11.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it might sing (c) it could fall on you (d) it is magnetic
  12. 12.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a slide (c) a flagpole (d) a crane
  13. 13.⚙️ Which of these is a lever? (a) a well pulley (b) a doorknob (c) a see-saw (d) a crane
  14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  16. 16.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
  17. 17.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
  18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
  19. 19.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the rope gets shorter (c) the bucket floats (d) water gets lighter
  20. 20.True or false: a see-saw is a lever. (a) False (b) True
  21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) string (c) coins as the load (d) turmeric powder
  22. 22.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
  23. 23.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) a magnet (d) coins as the load
  24. 24.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) how hard we must pull
  25. 25.True or false: a tap handle is a lever. (a) True (b) False
  26. 26.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
  27. 27.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  28. 28.⚖️ 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
  29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a battery cell (c) an empty thread reel (d) a small paper cup
  30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
  31. 31.True or false: a crane is an inclined plane. (a) True (b) False
  32. 32.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  33. 33.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a doorknob (c) a slide (d) a crowbar
  34. 34.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets wet (d) it gets longer
  35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) an empty thread reel (c) string (d) turmeric powder
  36. 36.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
  37. 37.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
  38. 38.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a crane (d) a slide
  39. 39.⚖️ 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
  40. 40.⚖️ 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) how hard we must pull (c) the lifting height (d) number of pulleys

Answer key

  1. False
  2. False
  3. True
  4. about half
  5. False
  6. an empty thread reel
  7. yeast
  8. a wheel and axle
  9. a mirror
  10. an inclined plane
  11. it could fall on you
  12. a slide
  13. a see-saw
  14. not needed
  15. a lever
  16. needed
  17. False
  18. not needed
  19. pulling down is easier
  20. True
  21. turmeric powder
  22. False
  23. a magnet
  24. number of pulleys
  25. False
  26. False
  27. not needed
  28. we keep it the same
  29. a battery cell
  30. False
  31. False
  32. True
  33. a doorknob
  34. it can hurt your finger
  35. turmeric powder
  36. not needed
  37. True
  38. a tap handle
  39. True
  40. how hard we must pull

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