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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 976 · 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.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it could fall on you (c) it might sing (d) it gets hot
  2. 2.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 20 cm (d) 10 cm
  3. 3.True or false: a small paper cup is not needed for the thread-reel pulley. (a) False (b) True
  4. 4.⚖️ 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
  5. 5.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
  6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
  7. 7.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
  8. 8.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
  9. 9.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
  10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the lifting height (b) number of pulleys (c) how hard we must pull (d) the same string
  11. 11.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
  12. 12.True or false: a see-saw is a lever. (a) False (b) True
  13. 13.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a see-saw (c) a crane (d) a crowbar
  14. 14.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  15. 15.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  16. 16.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a well pulley (c) a flagpole (d) a slide
  17. 17.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  18. 18.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) makes it magnetic (c) halves the weight (d) adds weight
  19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
  20. 20.⚖️ 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
  21. 21.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  22. 22.True or false: a tap handle is a lever. (a) True (b) False
  23. 23.True or false: coins as the load is not needed for the thread-reel pulley. (a) False (b) True
  24. 24.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a sloping road (d) a bottle opener
  25. 25.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a battery cell (d) coins as the load
  26. 26.True or false: turmeric powder is not needed for the thread-reel pulley. (a) False (b) True
  27. 27.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  28. 28.⚖️ 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 keep it the same (c) we measure it
  29. 29.True or false: a sloping road is a wheel and axle. (a) False (b) True
  30. 30.True or false: a tap handle is a wheel and axle. (a) False (b) True
  31. 31.True or false: a crowbar uses a pulley. (a) False (b) True
  32. 32.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) harder (d) impossible
  33. 33.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
  34. 34.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  35. 35.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a ramp (d) a flagpole
  36. 36.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
  37. 37.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) zero (d) about half
  38. 38.True or false: a see-saw is a wheel and axle. (a) True (b) False
  39. 39.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  40. 40.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a magnet (b) an empty thread reel (c) string (d) a small paper cup

Answer key

  1. it could fall on you
  2. 20 cm
  3. False
  4. the same string
  5. it can hurt your finger
  6. False
  7. on the flagpole
  8. True
  9. False
  10. how hard we must pull
  11. we keep it the same
  12. True
  13. a doorknob
  14. needed
  15. not needed
  16. a slide
  17. needed
  18. changes pull direction
  19. True
  20. False
  21. not needed
  22. False
  23. False
  24. a bottle opener
  25. a battery cell
  26. True
  27. True
  28. we keep it the same
  29. False
  30. True
  31. False
  32. harder
  33. an inclined plane
  34. a wheel and axle
  35. a flagpole
  36. False
  37. about half
  38. False
  39. a lever
  40. a magnet

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