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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 517 · 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 is needed for the thread-reel pulley? (a) turmeric powder (b) a small paper cup (c) a balloon (d) a battery cell
  2. 2.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a bottle opener (d) a crane
  3. 3.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) in a circle (c) down (d) sideways
  4. 4.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  5. 5.True or false: a bottle opener is a wheel and axle. (a) True (b) False
  6. 6.🧺 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
  7. 7.🧺 Do we need turmeric powder for the thread-reel pulley? (a) not needed (b) needed
  8. 8.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) turmeric powder (c) coins as the load (d) a small paper cup
  9. 9.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 10 cm (c) 40 cm (d) 20 cm
  10. 10.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
  11. 11.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
  12. 12.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
  13. 13.⚖️ 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
  14. 14.True or false: a flagpole uses a pulley. (a) False (b) True
  15. 15.True or false: a crowbar is a wheel and axle. (a) False (b) True
  16. 16.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  17. 17.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
  18. 18.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it is magnetic (c) it might sing (d) it gets hot
  19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
  20. 20.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
  21. 21.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a tap handle (c) a flagpole (d) a crane
  22. 22.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a tap handle (d) a slide
  23. 23.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  24. 24.True or false: a slide is a lever. (a) False (b) True
  25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  26. 26.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it can hurt your finger (d) it gets wet
  27. 27.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
  28. 28.🧺 Which of these is not needed for the thread-reel pulley? (a) a mirror (b) a small paper cup (c) coins as the load (d) an empty thread reel
  29. 29.⚖️ 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) False (b) True
  30. 30.🧺 Do we need a small paper cup for the thread-reel pulley? (a) not needed (b) needed
  31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same cup of coins (b) how hard we must pull (c) the same string (d) number of pulleys
  32. 32.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) False (b) True
  33. 33.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) turmeric powder (b) string (c) coins as the load (d) a pencil
  34. 34.⚙️ Which of these uses a pulley? (a) a well pulley (b) a ramp (c) a sloping road (d) a spoon lifting a lid
  35. 35.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a mirror (c) turmeric powder (d) an empty thread reel
  36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a balloon (c) a battery cell (d) string
  37. 37.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
  38. 38.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
  39. 39.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) False (b) True
  40. 40.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) yeast (d) a small paper cup

Answer key

  1. a small paper cup
  2. a doorknob
  3. down
  4. a lever
  5. False
  6. a magnet
  7. not needed
  8. turmeric powder
  9. 20 cm
  10. False
  11. about half
  12. not needed
  13. we keep it the same
  14. True
  15. False
  16. needed
  17. a lever
  18. it could fall on you
  19. we keep it the same
  20. False
  21. a tap handle
  22. a crowbar
  23. not needed
  24. False
  25. needed
  26. it can hurt your finger
  27. False
  28. a mirror
  29. True
  30. needed
  31. how hard we must pull
  32. False
  33. turmeric powder
  34. a well pulley
  35. an empty thread reel
  36. string
  37. harder
  38. a pulley
  39. True
  40. yeast

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