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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 858 · 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.True or false: a balloon is not needed for the thread-reel pulley. (a) False (b) True
  2. 2.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) coins as the load (d) an empty thread reel
  3. 3.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
  4. 4.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets longer (d) it gets wet
  5. 5.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a tap handle (c) a slide (d) a crane
  6. 6.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) impossible (b) the same (c) harder (d) easier
  7. 7.True or false: a doorknob is a wheel and axle. (a) True (b) False
  8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we change it (b) we keep it the same (c) we measure it
  9. 9.🏗️ 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
  10. 10.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  11. 11.True or false: a bottle opener is an inclined plane. (a) True (b) False
  12. 12.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) string (d) a battery cell
  13. 13.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
  14. 14.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  15. 15.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
  16. 16.⚖️ 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
  17. 17.True or false: yeast is not needed for the thread-reel pulley. (a) False (b) True
  18. 18.True or false: a tap handle is an inclined plane. (a) True (b) False
  19. 19.True or false: a slide is an inclined plane. (a) True (b) False
  20. 20.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 10 cm (c) 20 cm (d) 5 cm
  21. 21.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a see-saw (d) a well pulley
  22. 22.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it could fall on you (d) it might sing
  23. 23.⚖️ 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
  24. 24.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  25. 25.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
  26. 26.⚖️ 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 keep it the same (c) we change it
  27. 27.True or false: a sloping road is an inclined plane. (a) True (b) False
  28. 28.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) turmeric powder (c) a battery cell (d) string
  29. 29.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
  30. 30.True or false: a crowbar uses a pulley. (a) False (b) True
  31. 31.🧺 Do we need coins as the load for the thread-reel pulley? (a) not needed (b) needed
  32. 32.⚖️ 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 same cup of coins (c) how hard we must pull (d) the same string
  33. 33.⚖️ 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
  34. 34.🧺 Which of these is needed for the thread-reel pulley? (a) a battery cell (b) a magnet (c) coins as the load (d) a mirror
  35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) an empty thread reel (c) turmeric powder (d) coins as the load
  36. 36.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
  37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a balloon (b) a pencil (c) string (d) an empty thread reel
  38. 38.🧺 Do we need yeast for the thread-reel pulley? (a) not needed (b) needed
  39. 39.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) turmeric powder (d) a magnet
  40. 40.True or false: a flagpole uses a pulley. (a) False (b) True

Answer key

  1. True
  2. a magnet
  3. False
  4. it can hurt your finger
  5. a crane
  6. harder
  7. True
  8. we measure it
  9. down
  10. a wheel and axle
  11. False
  12. a battery cell
  13. False
  14. True
  15. needed
  16. True
  17. True
  18. False
  19. True
  20. 20 cm
  21. a doorknob
  22. it could fall on you
  23. True
  24. needed
  25. needed
  26. we change it
  27. True
  28. string
  29. changes pull direction
  30. False
  31. needed
  32. number of pulleys
  33. True
  34. coins as the load
  35. turmeric powder
  36. needed
  37. a balloon
  38. not needed
  39. a small paper cup
  40. True

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