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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 615 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
  2. 2.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a flagpole (d) a well pulley
  3. 3.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a ramp (d) a crowbar
  4. 4.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) not needed (b) needed
  5. 5.🛟 Why should you never stand under a load being lifted? (a) it gets hot (b) it is magnetic (c) it might sing (d) it could fall on you
  6. 6.True or false: a small paper cup is not needed for the thread-reel pulley. (a) True (b) False
  7. 7.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
  8. 8.True or false: a small paper cup is needed for the thread-reel pulley. (a) False (b) True
  9. 9.⚖️ 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
  10. 10.🧺 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 balloon
  11. 11.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  12. 12.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a battery cell (c) a mirror (d) a balloon
  13. 13.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) a pencil (c) a magnet (d) an empty thread reel
  14. 14.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  15. 15.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
  16. 16.⚖️ 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) False (b) True
  17. 17.True or false: a sloping road uses a pulley. (a) True (b) False
  18. 18.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 40 cm (d) 5 cm
  19. 19.📘 A pulley is a wheel with a groove for a ___. (a) nail (b) battery (c) magnet (d) rope
  20. 20.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
  21. 21.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
  22. 22.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) coins as the load (c) yeast (d) a small paper cup
  23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we keep it the same (c) we measure it
  24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) string (c) a mirror (d) an empty thread reel
  25. 25.🏗️ Why is a pulley used to lift water from a deep well? (a) pulling down is easier (b) the bucket floats (c) water gets lighter (d) the rope gets shorter
  26. 26.True or false: a crowbar is an inclined plane. (a) True (b) False
  27. 27.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a spoon lifting a lid (d) a ramp
  28. 28.True or false: string is not needed for the thread-reel pulley. (a) False (b) True
  29. 29.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) sideways (c) in a circle (d) down
  30. 30.🧺 Do we need a small paper cup for the thread-reel pulley? (a) needed (b) not needed
  31. 31.True or false: turmeric powder is not needed for the thread-reel pulley. (a) True (b) False
  32. 32.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
  33. 33.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) the same (b) harder (c) easier (d) impossible
  34. 34.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  35. 35.⚖️ 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
  36. 36.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  37. 37.True or false: a see-saw is a lever. (a) True (b) False
  38. 38.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  39. 39.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) about half (c) zero (d) the same
  40. 40.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a see-saw (c) a spoon lifting a lid (d) a ramp

Answer key

  1. changes pull direction
  2. a spoon lifting a lid
  3. a crowbar
  4. needed
  5. it could fall on you
  6. False
  7. a wheel and axle
  8. True
  9. True
  10. a balloon
  11. not needed
  12. an empty thread reel
  13. a magnet
  14. an inclined plane
  15. False
  16. False
  17. False
  18. 20 cm
  19. rope
  20. False
  21. False
  22. yeast
  23. we keep it the same
  24. a mirror
  25. pulling down is easier
  26. False
  27. a steering wheel
  28. False
  29. down
  30. needed
  31. True
  32. not needed
  33. harder
  34. a lever
  35. we keep it the same
  36. a pulley
  37. True
  38. not needed
  39. about half
  40. a ramp

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