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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 972 · 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 mirror for the thread-reel pulley? (a) needed (b) not needed
  2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) yeast (b) string (c) a pencil (d) an empty thread reel
  3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) how hard we must pull (c) the same string
  4. 4.⚖️ 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
  5. 5.⚙️ Which of these uses a pulley? (a) a well pulley (b) a crowbar (c) a ramp (d) a spoon lifting a lid
  6. 6.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  7. 7.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
  9. 9.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
  10. 10.True or false: coins as the load is needed for the thread-reel pulley. (a) False (b) True
  11. 11.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
  12. 12.True or false: string is needed for the thread-reel pulley. (a) False (b) True
  13. 13.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a small paper cup (d) a balloon
  14. 14.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
  15. 15.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
  16. 16.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it might sing (c) it gets hot (d) it is magnetic
  17. 17.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
  18. 18.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) a small paper cup (c) an empty thread reel (d) a battery cell
  19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
  20. 20.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a flagpole (d) a spoon lifting a lid
  21. 21.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  22. 22.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  23. 23.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  24. 24.⚙️ Which of these is a lever? (a) a tap handle (b) a doorknob (c) a crowbar (d) a sloping road
  25. 25.⚖️ 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) the lifting height (d) number of pulleys
  26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is the one thing we change. (a) True (b) False
  27. 27.True or false: a flagpole is a wheel and axle. (a) True (b) False
  28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
  29. 29.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a well pulley (c) a ramp (d) a crowbar
  30. 30.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
  31. 31.True or false: a crane is an inclined plane. (a) False (b) True
  32. 32.⚖️ 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
  33. 33.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) nail (d) battery
  34. 34.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  35. 35.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the bench (c) on the flagpole (d) in the tap
  36. 36.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  37. 37.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
  38. 38.True or false: a slide is an inclined plane. (a) False (b) True
  39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the lifting height (b) number of pulleys (c) how hard we must pull
  40. 40.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False

Answer key

  1. not needed
  2. yeast
  3. the same string
  4. True
  5. a well pulley
  6. needed
  7. needed
  8. we change it
  9. True
  10. True
  11. not needed
  12. True
  13. a balloon
  14. about half
  15. harder
  16. it could fall on you
  17. True
  18. a battery cell
  19. False
  20. a spoon lifting a lid
  21. a pulley
  22. needed
  23. needed
  24. a crowbar
  25. how hard we must pull
  26. False
  27. False
  28. False
  29. a ramp
  30. a wheel and axle
  31. False
  32. True
  33. rope
  34. a lever
  35. on the flagpole
  36. not needed
  37. False
  38. True
  39. the lifting height
  40. True

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