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Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 816 · 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.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
  2. 2.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
  3. 3.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
  4. 4.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 40 cm (c) 20 cm (d) 5 cm
  5. 5.⚖️ 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 change it (c) we measure it
  6. 6.True or false: a flagpole is a lever. (a) True (b) False
  7. 7.True or false: a crowbar is a lever. (a) False (b) True
  8. 8.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a magnet (c) a balloon (d) a pencil
  9. 9.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) a balloon (d) string
  10. 10.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
  11. 11.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
  12. 12.🧺 Do we need a battery cell for the thread-reel pulley? (a) needed (b) not needed
  13. 13.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a ramp (d) a steering wheel
  14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
  15. 15.🧺 Do we need a magnet for the thread-reel pulley? (a) not needed (b) needed
  16. 16.True or false: a flagpole uses a pulley. (a) False (b) True
  17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
  18. 18.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) double (b) the same (c) about half (d) zero
  19. 19.True or false: string is needed for the thread-reel pulley. (a) True (b) False
  20. 20.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the flagpole (b) on the blackboard (c) in the tap (d) on the bench
  21. 21.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
  22. 22.🧺 Do we need string for the thread-reel pulley? (a) not needed (b) needed
  23. 23.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
  24. 24.⚖️ 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
  25. 25.⚖️ 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
  26. 26.True or false: a steering wheel is a wheel and axle. (a) False (b) True
  27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a magnet (c) string (d) coins as the load
  28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  29. 29.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
  30. 30.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a slide (c) a sloping road (d) a crane
  31. 31.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) halves the weight (d) changes pull direction
  32. 32.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) yeast (c) a small paper cup (d) a pencil
  33. 33.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it gets wet (c) it can hurt your finger (d) it turns blue
  34. 34.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  35. 35.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  36. 36.True or false: yeast is needed for the thread-reel pulley. (a) True (b) False
  37. 37.True or false: a pencil is not needed for the thread-reel pulley. (a) False (b) True
  38. 38.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) True (b) False
  39. 39.📘 A pulley is a wheel with a groove for a ___. (a) rope (b) magnet (c) battery (d) nail
  40. 40.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a ramp (d) a well pulley

Answer key

  1. False
  2. True
  3. not needed
  4. 20 cm
  5. we keep it the same
  6. False
  7. True
  8. a pencil
  9. a balloon
  10. a pulley
  11. down
  12. not needed
  13. a ramp
  14. we keep it the same
  15. not needed
  16. True
  17. False
  18. about half
  19. True
  20. on the flagpole
  21. False
  22. needed
  23. not needed
  24. True
  25. we keep it the same
  26. True
  27. a magnet
  28. a lever
  29. a wheel and axle
  30. a tap handle
  31. changes pull direction
  32. yeast
  33. it can hurt your finger
  34. True
  35. True
  36. False
  37. False
  38. False
  39. rope
  40. a see-saw

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