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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 310 · 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 tap handle is a wheel and axle. (a) True (b) False
  2. 2.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  3. 3.🇮🇳 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
  4. 4.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
  5. 5.⚖️ 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) number of pulleys (c) the same cup of coins
  6. 6.True or false: a small paper cup is needed for the thread-reel pulley. (a) True (b) False
  7. 7.⚖️ 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 measure it (c) we change it
  8. 8.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) zero (c) double (d) about half
  9. 9.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) changes pull direction (c) adds weight (d) makes it magnetic
  10. 10.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
  11. 11.⚖️ 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) the same cup of coins (c) number of pulleys (d) how hard we must pull
  12. 12.True or false: a bottle opener is a wheel and axle. (a) False (b) True
  13. 13.True or false: a magnet is needed for the thread-reel pulley. (a) True (b) False
  14. 14.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it gets longer (c) it gets wet (d) it can hurt your finger
  15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 10 cm (d) 5 cm
  16. 16.True or false: a battery cell is needed for the thread-reel pulley. (a) True (b) False
  17. 17.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  18. 18.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  19. 19.⚖️ 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
  20. 20.True or false: coins as the load is not needed for the thread-reel pulley. (a) True (b) False
  21. 21.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
  22. 22.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
  23. 23.🛟 Why should you never stand under a load being lifted? (a) it could fall on you (b) it gets hot (c) it might sing (d) it is magnetic
  24. 24.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
  25. 25.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
  26. 26.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) True (b) False
  27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) an empty thread reel (d) a small paper cup
  28. 28.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
  29. 29.⚖️ 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 measure it (c) we keep it the same
  30. 30.⚖️ 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
  31. 31.🧺 Which of these is needed for the thread-reel pulley? (a) a small paper cup (b) yeast (c) a magnet (d) turmeric powder
  32. 32.True or false: a bottle opener is a lever. (a) False (b) True
  33. 33.🧺 Which of these is not needed for the thread-reel pulley? (a) turmeric powder (b) string (c) an empty thread reel (d) coins as the load
  34. 34.True or false: a well pulley is an inclined plane. (a) False (b) True
  35. 35.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  36. 36.True or false: a ramp uses a pulley. (a) False (b) True
  37. 37.🏗️ 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
  38. 38.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  39. 39.True or false: yeast is not needed for the thread-reel pulley. (a) True (b) False
  40. 40.⚖️ 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) True (b) False

Answer key

  1. True
  2. a pulley
  3. on the flagpole
  4. not needed
  5. the same cup of coins
  6. True
  7. we change it
  8. about half
  9. changes pull direction
  10. True
  11. how hard we must pull
  12. False
  13. False
  14. it can hurt your finger
  15. 20 cm
  16. False
  17. not needed
  18. a pulley
  19. False
  20. False
  21. True
  22. False
  23. it could fall on you
  24. a spoon lifting a lid
  25. False
  26. False
  27. turmeric powder
  28. harder
  29. we keep it the same
  30. False
  31. a small paper cup
  32. True
  33. turmeric powder
  34. False
  35. needed
  36. False
  37. down
  38. needed
  39. True
  40. True

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