← Thread-reel pulley lesson New set →

Pulley STEM Project Worksheet

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

Answer key

  1. not needed
  2. we change it
  3. needed
  4. False
  5. number of pulleys
  6. a pencil
  7. needed
  8. how hard we must pull
  9. a battery cell
  10. string
  11. 20 cm
  12. False
  13. a spoon lifting a lid
  14. we keep it the same
  15. down
  16. a wheel and axle
  17. not needed
  18. needed
  19. True
  20. about half
  21. an empty thread reel
  22. it could fall on you
  23. True
  24. True
  25. a mirror
  26. a lever
  27. it can hurt your finger
  28. False
  29. yeast
  30. a slide
  31. a steering wheel
  32. True
  33. True
  34. False
  35. not needed
  36. False
  37. True
  38. the same string
  39. False
  40. a magnet

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids