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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 441 · 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.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a bottle opener (d) a ramp
  2. 2.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a balloon (d) coins as the load
  3. 3.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
  4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) yeast (d) string
  5. 5.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) string (c) a magnet (d) a pencil
  6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) the same (c) impossible (d) harder
  7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  8. 8.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) in a circle (d) down
  9. 9.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
  10. 10.True or false: a spoon lifting a lid is a lever. (a) False (b) True
  11. 11.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 10 cm (c) 40 cm (d) 5 cm
  12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a pencil (d) a small paper cup
  13. 13.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  14. 14.🇮🇳 Where do we see a pulley at school on Independence Day? (a) in the tap (b) on the flagpole (c) on the blackboard (d) on the bench
  15. 15.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) about half (d) the same
  16. 16.⚖️ 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) False (b) True
  17. 17.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a bottle opener (c) a crowbar (d) a slide
  18. 18.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a flagpole (d) a sloping road
  19. 19.⚖️ 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
  20. 20.⚙️ Which of these is a lever? (a) a ramp (b) a see-saw (c) a flagpole (d) a sloping road
  21. 21.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a battery cell (c) a pencil (d) a small paper cup
  23. 23.⚖️ 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
  24. 24.⚖️ 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) the same cup of coins (c) number of pulleys
  25. 25.⚖️ 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 string (c) number of pulleys (d) the same cup of coins
  26. 26.True or false: a see-saw uses a pulley. (a) False (b) True
  27. 27.🛟 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
  28. 28.⚙️ Which of these uses a pulley? (a) a tap handle (b) a slide (c) a well pulley (d) a see-saw
  29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
  30. 30.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
  31. 31.True or false: a doorknob is a wheel and axle. (a) False (b) True
  32. 32.⚖️ 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
  33. 33.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
  34. 34.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
  35. 35.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a spoon lifting a lid (c) a ramp (d) a tap handle
  36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a balloon (c) coins as the load (d) a mirror
  37. 37.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  38. 38.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
  39. 39.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
  40. 40.True or false: a steering wheel is an inclined plane. (a) False (b) True

Answer key

  1. a crane
  2. a balloon
  3. a pulley
  4. yeast
  5. a magnet
  6. harder
  7. not needed
  8. down
  9. needed
  10. True
  11. 20 cm
  12. a balloon
  13. not needed
  14. on the flagpole
  15. about half
  16. False
  17. a slide
  18. a doorknob
  19. False
  20. a see-saw
  21. not needed
  22. a battery cell
  23. we change it
  24. the same cup of coins
  25. how hard we must pull
  26. False
  27. it could fall on you
  28. a well pulley
  29. it can hurt your finger
  30. False
  31. True
  32. we keep it the same
  33. False
  34. True
  35. a ramp
  36. coins as the load
  37. needed
  38. True
  39. an inclined plane
  40. False

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