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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 442 · 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.True or false: a ramp uses a pulley. (a) False (b) True
  2. 2.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) yeast (c) a battery cell (d) a mirror
  3. 3.True or false: a spoon lifting a lid is a lever. (a) False (b) True
  4. 4.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
  5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) coins as the load (b) yeast (c) a mirror (d) a magnet
  6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a battery cell (c) a small paper cup (d) string
  7. 7.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) down (c) sideways (d) up
  8. 8.True or false: a bottle opener is an inclined plane. (a) False (b) True
  9. 9.True or false: a crane is a wheel and axle. (a) True (b) False
  10. 10.⚖️ 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) number of pulleys (c) the lifting height (d) the same string
  11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) turmeric powder (c) string (d) a pencil
  12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a balloon (c) a small paper cup (d) a pencil
  13. 13.⚖️ 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
  14. 14.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
  15. 15.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
  16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 10 cm (d) 40 cm
  17. 17.True or false: a see-saw is a lever. (a) True (b) False
  18. 18.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a crane (d) a sloping road
  19. 19.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
  20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) an empty thread reel (d) yeast
  21. 21.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a magnet (c) an empty thread reel (d) coins as the load
  22. 22.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  23. 23.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  24. 24.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
  25. 25.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it can hurt your finger (d) it gets longer
  27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) an empty thread reel (d) turmeric powder
  28. 28.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  29. 29.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
  30. 30.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we change it (b) we keep it the same (c) we measure it
  31. 31.⚖️ 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
  32. 32.⚙️ Which of these uses a pulley? (a) a tap handle (b) a flagpole (c) a see-saw (d) a slide
  33. 33.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) how hard we must pull (b) number of pulleys (c) the same string
  34. 34.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a tap handle (c) a slide (d) a crane
  35. 35.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
  36. 36.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
  37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) about half (c) double (d) the same
  38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  39. 39.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
  40. 40.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed

Answer key

  1. False
  2. a pencil
  3. True
  4. False
  5. coins as the load
  6. a battery cell
  7. down
  8. False
  9. False
  10. number of pulleys
  11. turmeric powder
  12. a balloon
  13. we measure it
  14. True
  15. it could fall on you
  16. 20 cm
  17. True
  18. a crane
  19. a lever
  20. yeast
  21. a magnet
  22. True
  23. True
  24. False
  25. a wheel and axle
  26. it can hurt your finger
  27. turmeric powder
  28. a wheel and axle
  29. False
  30. we change it
  31. False
  32. a flagpole
  33. the same string
  34. a tap handle
  35. we keep it the same
  36. False
  37. about half
  38. not needed
  39. False
  40. not needed

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