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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 425 · 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.⚖️ 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
  2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) True (b) False
  3. 3.⚖️ 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 keep it the same (b) we change it (c) we measure it
  4. 4.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a pencil (c) an empty thread reel (d) a balloon
  5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) a small paper cup (d) a mirror
  6. 6.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a crane (d) a crowbar
  7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a pencil (d) a magnet
  8. 8.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it is magnetic (c) it could fall on you (d) it gets hot
  9. 9.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  10. 10.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
  11. 11.🏗️ Why is a pulley used to lift water from a deep well? (a) water gets lighter (b) the bucket floats (c) pulling down is easier (d) the rope gets shorter
  12. 12.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  13. 13.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
  14. 14.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
  15. 15.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  16. 16.True or false: a steering wheel uses a pulley. (a) True (b) False
  17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) turmeric powder (d) an empty thread reel
  18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
  19. 19.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
  20. 20.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys (d) the lifting height
  21. 21.True or false: a slide uses a pulley. (a) True (b) False
  22. 22.⚖️ 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 measure it (b) we change it (c) we keep it the same
  23. 23.True or false: a battery cell is not needed for the thread-reel pulley. (a) False (b) True
  24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) a balloon (d) a battery cell
  25. 25.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
  26. 26.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
  27. 27.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
  28. 28.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
  29. 29.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  30. 30.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a spoon lifting a lid (c) a see-saw (d) a bottle opener
  31. 31.True or false: a sloping road is an inclined plane. (a) False (b) True
  32. 32.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a sloping road (d) a crowbar
  33. 33.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
  34. 34.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
  35. 35.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
  36. 36.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  37. 37.⚖️ 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) False (b) True
  38. 38.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  39. 39.⚖️ 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) False (b) True
  40. 40.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False

Answer key

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

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