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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 836 · 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) a balloon (b) a mirror (c) string (d) a battery cell
  2. 2.True or false: a crowbar is a wheel and axle. (a) True (b) False
  3. 3.⚙️ Which of these is an inclined plane? (a) a crane (b) a crowbar (c) a steering wheel (d) a ramp
  4. 4.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) an empty thread reel (d) a pencil
  5. 5.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) in a circle (b) up (c) down (d) sideways
  6. 6.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a see-saw (c) a flagpole (d) a slide
  7. 7.⚖️ 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) the lifting height (d) the same cup of coins
  8. 8.True or false: a well pulley uses a pulley. (a) True (b) False
  9. 9.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) pulling down is easier (c) the bucket floats (d) water gets lighter
  10. 10.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
  11. 11.True or false: a flagpole uses a pulley. (a) True (b) False
  12. 12.🛟 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
  13. 13.🇮🇳 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
  14. 14.True or false: a see-saw is a lever. (a) True (b) False
  15. 15.🧺 Do we need a balloon for the thread-reel pulley? (a) not needed (b) needed
  16. 16.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a small paper cup (c) a magnet (d) a balloon
  17. 17.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  18. 18.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  19. 19.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) an empty thread reel (c) a battery cell (d) string
  20. 20.True or false: a sloping road uses a pulley. (a) False (b) True
  21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) False (b) True
  22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is what we measure. (a) False (b) True
  23. 23.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) halves the weight (c) makes it magnetic (d) changes pull direction
  24. 24.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
  25. 25.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
  26. 26.⚖️ 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) the same cup of coins (c) how hard we must pull
  27. 27.⚖️ 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
  28. 28.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 5 cm (b) 40 cm (c) 10 cm (d) 20 cm
  29. 29.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a mirror (b) coins as the load (c) a small paper cup (d) string
  30. 30.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) string (d) a balloon
  32. 32.⚖️ 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
  33. 33.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  34. 34.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) string (d) an empty thread reel
  35. 35.True or false: a tap handle is an inclined plane. (a) True (b) False
  36. 36.🧺 Do we need coins as the load for the thread-reel pulley? (a) needed (b) not needed
  37. 37.⚖️ 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
  38. 38.🧺 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
  39. 39.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) harder (d) the same
  40. 40.True or false: a well pulley is a lever. (a) False (b) True

Answer key

  1. string
  2. False
  3. a ramp
  4. yeast
  5. down
  6. a slide
  7. how hard we must pull
  8. True
  9. pulling down is easier
  10. True
  11. True
  12. it can hurt your finger
  13. on the flagpole
  14. True
  15. not needed
  16. a small paper cup
  17. needed
  18. not needed
  19. a battery cell
  20. False
  21. True
  22. False
  23. changes pull direction
  24. False
  25. a wheel and axle
  26. the same cup of coins
  27. True
  28. 20 cm
  29. a mirror
  30. False
  31. a balloon
  32. False
  33. needed
  34. turmeric powder
  35. False
  36. needed
  37. False
  38. a magnet
  39. harder
  40. False

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