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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 588 · 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.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a small paper cup (d) a balloon
  2. 2.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
  3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we keep it the same (c) we change it
  4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
  5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
  6. 6.True or false: a bottle opener uses a pulley. (a) True (b) False
  7. 7.True or false: a tap handle is a lever. (a) True (b) False
  8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) coins as the load (c) a small paper cup (d) an empty thread reel
  9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 5 cm (d) 20 cm
  10. 10.⚖️ 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) True (b) False
  11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) a mirror (d) a small paper cup
  12. 12.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
  13. 13.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  14. 14.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) yeast (c) a balloon (d) an empty thread reel
  15. 15.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a slide (c) a bottle opener (d) a flagpole
  16. 16.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
  17. 17.⚖️ 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
  18. 18.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  19. 19.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) up (c) in a circle (d) sideways
  20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
  21. 21.True or false: a sloping road is a lever. (a) False (b) True
  22. 22.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  23. 23.True or false: a doorknob is a wheel and axle. (a) True (b) False
  24. 24.True or false: a slide is an inclined plane. (a) False (b) True
  25. 25.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) rope (c) magnet (d) battery
  26. 26.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
  27. 27.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  28. 28.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a see-saw (c) a crane (d) a crowbar
  29. 29.⚖️ 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
  30. 30.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  31. 31.⚙️ Which of these is a lever? (a) a slide (b) a well pulley (c) a steering wheel (d) a crowbar
  32. 32.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
  34. 34.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a bottle opener (c) a ramp (d) a see-saw
  35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a battery cell (b) a small paper cup (c) a pencil (d) coins as the load
  36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a small paper cup (c) string (d) a magnet
  37. 37.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
  38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
  39. 39.⚙️ Which of these is a lever? (a) a sloping road (b) a spoon lifting a lid (c) a ramp (d) a doorknob
  40. 40.⚖️ 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

Answer key

  1. a balloon
  2. False
  3. we change it
  4. False
  5. about half
  6. False
  7. False
  8. yeast
  9. 20 cm
  10. False
  11. a small paper cup
  12. a pulley
  13. True
  14. an empty thread reel
  15. a tap handle
  16. changes pull direction
  17. False
  18. needed
  19. down
  20. we measure it
  21. False
  22. not needed
  23. True
  24. True
  25. rope
  26. an inclined plane
  27. needed
  28. a crane
  29. the same string
  30. not needed
  31. a crowbar
  32. needed
  33. False
  34. a ramp
  35. a battery cell
  36. a magnet
  37. True
  38. harder
  39. a spoon lifting a lid
  40. True

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