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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 896 · 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.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
  2. 2.True or false: coins as the load is needed for the thread-reel pulley. (a) True (b) False
  3. 3.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  4. 4.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the bench (c) on the blackboard (d) on the flagpole
  5. 5.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a small paper cup (c) yeast (d) coins as the load
  7. 7.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
  8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
  9. 9.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
  10. 10.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) an empty thread reel (d) yeast
  11. 11.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
  12. 12.⚙️ Which of these is a lever? (a) a ramp (b) a crane (c) a crowbar (d) a well pulley
  13. 13.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  14. 14.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets wet (c) it gets longer (d) it can hurt your finger
  15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a small paper cup (d) a magnet
  16. 16.⚖️ 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 string (b) how hard we must pull (c) the lifting height (d) number of pulleys
  17. 17.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) an empty thread reel
  19. 19.True or false: a bottle opener is a lever. (a) True (b) False
  20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) in a circle (c) up (d) sideways
  21. 21.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
  22. 22.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
  23. 23.True or false: a doorknob is a wheel and axle. (a) True (b) False
  24. 24.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) yeast (c) turmeric powder (d) an empty thread reel
  25. 25.⚙️ Which of these uses a pulley? (a) a crane (b) a sloping road (c) a see-saw (d) a doorknob
  26. 26.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a slide (d) a doorknob
  27. 27.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
  28. 28.True or false: a bottle opener is an inclined plane. (a) True (b) False
  29. 29.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  30. 30.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a see-saw (c) a ramp (d) a crowbar
  31. 31.True or false: a pencil is needed for the thread-reel pulley. (a) True (b) False
  32. 32.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) the same (d) zero
  33. 33.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
  34. 34.⚖️ 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
  35. 35.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it is magnetic (d) it gets hot
  36. 36.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
  37. 37.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a pencil (d) a small paper cup
  38. 38.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) easier (d) the same
  39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) a magnet (d) a small paper cup
  40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) how hard we must pull (b) the same cup of coins (c) the lifting height (d) the same string

Answer key

  1. an inclined plane
  2. True
  3. needed
  4. on the flagpole
  5. not needed
  6. yeast
  7. False
  8. we keep it the same
  9. False
  10. yeast
  11. False
  12. a crowbar
  13. an inclined plane
  14. it can hurt your finger
  15. a magnet
  16. number of pulleys
  17. not needed
  18. a battery cell
  19. True
  20. down
  21. True
  22. False
  23. True
  24. an empty thread reel
  25. a crane
  26. a doorknob
  27. True
  28. False
  29. True
  30. a steering wheel
  31. True
  32. about half
  33. 20 cm
  34. True
  35. it could fall on you
  36. False
  37. a battery cell
  38. harder
  39. a small paper cup
  40. how hard we must pull

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