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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 951 · 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) yeast (b) turmeric powder (c) a magnet (d) an empty thread reel
  2. 2.⚖️ 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 cup of coins (c) number of pulleys (d) the same string
  3. 3.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a sloping road (d) a slide
  4. 4.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crowbar (c) a sloping road (d) a flagpole
  5. 5.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) string (c) a battery cell (d) yeast
  6. 6.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) string (d) a magnet
  7. 7.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
  8. 8.⚖️ 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
  9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
  10. 10.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  11. 11.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) yeast (d) a pencil
  12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is kept the same. (a) False (b) True
  13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
  14. 14.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
  15. 15.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  16. 16.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 20 cm (b) 40 cm (c) 5 cm (d) 10 cm
  17. 17.True or false: a well pulley is a lever. (a) False (b) True
  18. 18.True or false: a magnet is not needed for the thread-reel pulley. (a) False (b) True
  19. 19.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
  20. 20.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
  21. 21.True or false: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
  22. 22.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we keep it the same (b) we measure it (c) we change it
  24. 24.🛟 Why should you not wrap the string around your finger? (a) it turns blue (b) it can hurt your finger (c) it gets longer (d) it gets wet
  25. 25.True or false: a flagpole uses a pulley. (a) True (b) False
  26. 26.True or false: a crane is an inclined plane. (a) True (b) False
  27. 27.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  28. 28.⚙️ Which of these is a lever? (a) a doorknob (b) a flagpole (c) a bottle opener (d) a ramp
  29. 29.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a crowbar (d) a crane
  30. 30.⚙️ Which of these is a lever? (a) a sloping road (b) a well pulley (c) a flagpole (d) a see-saw
  31. 31.True or false: a spoon lifting a lid is a lever. (a) False (b) True
  32. 32.🧺 Which of these is not needed for the thread-reel pulley? (a) a balloon (b) string (c) coins as the load (d) a small paper cup
  33. 33.True or false: a tap handle is a lever. (a) True (b) False
  34. 34.⚖️ 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
  35. 35.🏗️ What does a single fixed pulley mainly do? (a) changes pull direction (b) halves the weight (c) adds weight (d) makes it magnetic
  36. 36.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
  37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) an empty thread reel (c) a small paper cup (d) a battery cell
  38. 38.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a small paper cup (c) a battery cell (d) a mirror
  39. 39.True or false: a bottle opener is a wheel and axle. (a) True (b) False
  40. 40.🏗️ 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

Answer key

  1. an empty thread reel
  2. how hard we must pull
  3. a tap handle
  4. a flagpole
  5. string
  6. a magnet
  7. needed
  8. True
  9. about half
  10. a lever
  11. a pencil
  12. False
  13. we measure it
  14. an inclined plane
  15. a pulley
  16. 20 cm
  17. False
  18. True
  19. a lever
  20. it could fall on you
  21. True
  22. not needed
  23. we keep it the same
  24. it can hurt your finger
  25. True
  26. False
  27. not needed
  28. a bottle opener
  29. a steering wheel
  30. a see-saw
  31. True
  32. a balloon
  33. False
  34. False
  35. changes pull direction
  36. a lever
  37. a battery cell
  38. a small paper cup
  39. False
  40. down

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