← Thread-reel pulley lesson New set →

Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 50 · 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 string 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 measure it (b) we keep it the same (c) we change it
  3. 3.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 5 cm (c) 20 cm (d) 40 cm
  4. 4.🧺 Do we need a pencil for the thread-reel pulley? (a) needed (b) not needed
  5. 5.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a spoon lifting a lid (d) a flagpole
  6. 6.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a small paper cup (c) a battery cell (d) an empty thread reel
  7. 7.🛟 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
  8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) number of pulleys (b) the same string (c) the same cup of coins (d) how hard we must pull
  9. 9.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the blackboard (b) on the flagpole (c) in the tap (d) on the bench
  10. 10.True or false: a mirror is not needed for the thread-reel pulley. (a) False (b) True
  11. 11.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) an empty thread reel (c) coins as the load (d) a magnet
  12. 12.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) impossible (c) the same (d) harder
  13. 13.🧺 Which of these is needed for the thread-reel pulley? (a) turmeric powder (b) a pencil (c) a mirror (d) a magnet
  14. 14.⚖️ 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 measure it (c) we keep it the same
  15. 15.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) a mirror
  16. 16.True or false: a flagpole is a wheel and axle. (a) True (b) False
  17. 17.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a well pulley (d) a crowbar
  18. 18.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it could fall on you (c) it gets hot (d) it is magnetic
  19. 19.True or false: a flagpole uses a pulley. (a) True (b) False
  20. 20.🧺 Do we need a mirror for the thread-reel pulley? (a) needed (b) not needed
  21. 21.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
  22. 22.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a balloon (c) a pencil (d) coins as the load
  23. 23.True or false: an empty thread reel is needed for the thread-reel pulley. (a) True (b) False
  24. 24.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) string (d) a pencil
  25. 25.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
  26. 26.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
  27. 27.🧺 Do we need a balloon for the thread-reel pulley? (a) needed (b) not needed
  28. 28.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) the same (b) double (c) zero (d) about half
  29. 29.🧺 Which of these is needed for the thread-reel pulley? (a) a mirror (b) a battery cell (c) an empty thread reel (d) turmeric powder
  30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) turmeric powder (c) coins as the load (d) a pencil
  31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is kept the same. (a) True (b) False
  32. 32.True or false: a doorknob is an inclined plane. (a) True (b) False
  33. 33.True or false: a sloping road is a lever. (a) True (b) False
  34. 34.True or false: a magnet is not needed for the thread-reel pulley. (a) True (b) False
  35. 35.True or false: a flagpole is a lever. (a) True (b) False
  36. 36.True or false: a bottle opener is a lever. (a) True (b) False
  37. 37.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
  38. 38.⚖️ 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
  39. 39.True or false: a balloon is needed for the thread-reel pulley. (a) True (b) False
  40. 40.🏗️ What does a single fixed pulley mainly do? (a) makes it magnetic (b) adds weight (c) changes pull direction (d) halves the weight

Answer key

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

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