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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 884 · 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.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) the same (c) double (d) about half
  2. 2.🧺 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) an empty thread reel
  3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
  4. 4.True or false: yeast is needed for the thread-reel pulley. (a) False (b) True
  5. 5.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
  6. 6.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
  7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  8. 8.⚙️ Which of these is a lever? (a) a slide (b) a ramp (c) a see-saw (d) a flagpole
  9. 9.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  10. 10.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a ramp (d) a see-saw
  11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a pencil (c) yeast (d) turmeric powder
  12. 12.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it could fall on you (d) it might sing
  13. 13.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  14. 14.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  15. 15.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  16. 16.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a sloping road (d) a flagpole
  17. 17.True or false: a tap handle is a wheel and axle. (a) True (b) False
  18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we keep it the same (b) we change it (c) we measure it
  19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
  20. 20.⚖️ 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
  21. 21.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a mirror (c) yeast (d) an empty thread reel
  22. 22.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
  23. 23.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
  24. 24.True or false: a see-saw is a lever. (a) False (b) True
  25. 25.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) string (c) coins as the load (d) a magnet
  27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) easier (c) impossible (d) the same
  28. 28.True or false: string is needed for the thread-reel pulley. (a) False (b) True
  29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
  30. 30.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
  31. 31.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
  32. 32.⚖️ 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
  33. 33.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) coins as the load (c) a balloon (d) a magnet
  34. 34.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) pulling down is easier (c) the rope gets shorter (d) water gets lighter
  35. 35.⚖️ 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) number of pulleys (c) how hard we must pull
  36. 36.True or false: a flagpole is an inclined plane. (a) True (b) False
  37. 37.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) number of pulleys (b) the same cup of coins (c) the lifting height (d) the same string
  38. 38.True or false: a slide is an inclined plane. (a) True (b) False
  39. 39.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a mirror (d) a small paper cup
  40. 40.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the blackboard (c) on the bench (d) on the flagpole

Answer key

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

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