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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 853 · 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 turmeric powder for the thread-reel pulley? (a) needed (b) not needed
  2. 2.True or false: a steering wheel is an inclined plane. (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 measure it (b) we change it (c) we keep it the same
  4. 4.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  5. 5.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) easier (d) harder
  6. 6.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) makes it magnetic (d) halves the weight
  7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
  8. 8.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) coins as the load (d) yeast
  10. 10.⚖️ 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
  11. 11.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a well pulley (c) a tap handle (d) a crane
  12. 12.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
  13. 13.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
  14. 14.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
  15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same string
  16. 16.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  18. 18.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  19. 19.⚖️ 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
  20. 20.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
  21. 21.⚙️ Which of these is a lever? (a) a crane (b) a steering wheel (c) a see-saw (d) a ramp
  22. 22.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
  23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
  24. 24.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
  25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) an empty thread reel (d) a magnet
  26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the lifting height (c) how hard we must pull
  27. 27.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  28. 28.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
  29. 29.True or false: a crowbar uses a pulley. (a) False (b) True
  30. 30.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a battery cell (d) coins as the load
  31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a balloon (d) string
  32. 32.True or false: a spoon lifting a lid is a lever. (a) False (b) True
  33. 33.True or false: a see-saw is a lever. (a) False (b) True
  34. 34.⚙️ Which simple machine is a ramp? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  35. 35.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
  36. 36.True or false: a well pulley is a wheel and axle. (a) True (b) False
  37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) coins as the load (c) string (d) an empty thread reel
  38. 38.🧺 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) string (d) a mirror
  39. 39.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
  40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys

Answer key

  1. not needed
  2. False
  3. we keep it the same
  4. a lever
  5. harder
  6. changes pull direction
  7. about half
  8. not needed
  9. yeast
  10. True
  11. a tap handle
  12. False
  13. rope
  14. False
  15. the same string
  16. needed
  17. needed
  18. needed
  19. False
  20. True
  21. a see-saw
  22. it could fall on you
  23. 20 cm
  24. False
  25. an empty thread reel
  26. the lifting height
  27. needed
  28. False
  29. False
  30. coins as the load
  31. a balloon
  32. True
  33. True
  34. an inclined plane
  35. False
  36. False
  37. a battery cell
  38. a mirror
  39. down
  40. the same cup of coins

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