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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 224 · 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.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) a pencil (c) an empty thread reel (d) a battery cell
  3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) False (b) True
  4. 4.True or false: a flagpole is a lever. (a) False (b) True
  5. 5.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) double (c) the same (d) zero
  6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a small paper cup (d) a magnet
  7. 7.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
  8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) False (b) True
  9. 9.True or false: turmeric powder is needed for the thread-reel pulley. (a) True (b) False
  10. 10.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it can hurt your finger (c) it gets wet (d) it turns blue
  11. 11.True or false: a crane uses a pulley. (a) True (b) False
  12. 12.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
  13. 13.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) magnet (c) rope (d) nail
  14. 14.🛟 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
  15. 15.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) number of pulleys (d) the lifting height
  16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
  17. 17.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
  18. 18.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  19. 19.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  20. 20.True or false: a well pulley uses a pulley. (a) True (b) False
  21. 21.⚖️ 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
  22. 22.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 5 cm (c) 40 cm (d) 10 cm
  23. 23.True or false: a bottle opener is a lever. (a) False (b) True
  24. 24.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a tap handle (d) a slide
  25. 25.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a pencil (c) turmeric powder (d) a battery cell
  26. 26.🧺 Which of these is not needed for the thread-reel pulley? (a) a magnet (b) a pencil (c) string (d) a small paper cup
  27. 27.True or false: string 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 same cup of coins”? (a) we measure it (b) we change it (c) we keep it the same
  29. 29.⚙️ Which of these is a lever? (a) a sloping road (b) a spoon lifting a lid (c) a flagpole (d) a well pulley
  30. 30.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) in the tap (c) on the flagpole (d) on the blackboard
  31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
  32. 32.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
  33. 33.⚖️ 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 lifting height (c) how hard we must pull (d) the same string
  34. 34.True or false: a see-saw is a wheel and axle. (a) False (b) True
  35. 35.True or false: a slide is a lever. (a) True (b) False
  36. 36.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
  37. 37.True or false: a well pulley is an inclined plane. (a) True (b) False
  38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) turmeric powder (d) an empty thread reel
  39. 39.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a slide (d) a well pulley
  40. 40.True or false: a crowbar is a wheel and axle. (a) True (b) False

Answer key

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

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