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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 241 · 40 questions
TalentJR

What you do (Coins × distance): 1. Balance the ruler on the pencil at its 15 cm mark. 2. Put coins at a measured distance on the left side. 3. Place coins on the right and slide them until the ruler balances. 4. Check: coins × distance on the left = coins × distance on the right; press gently.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we measure it (b) we change it (c) we keep it the same
  2. 2.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a flat table (d) a balloon
  3. 3.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are too cold (d) they are magnetic
  4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) yeast (d) a 30 cm ruler
  5. 5.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
  6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
  7. 7.True or false: a doorknob uses a pulley. (a) True (b) False
  8. 8.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) yeast (d) a mirror
  9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
  10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
  11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
  12. 12.True or false: a mirror is needed for the ruler lever. (a) False (b) True
  13. 13.True or false: a see-saw is a wheel and axle. (a) False (b) True
  14. 14.True or false: a see-saw is a lever. (a) False (b) True
  15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
  17. 17.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  18. 18.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
  19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
  20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
  21. 21.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
  22. 22.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) neither, it balances (c) both go up (d) the right side
  23. 23.True or false: a doorknob is an inclined plane. (a) True (b) False
  24. 24.True or false: a see-saw is an inclined plane. (a) False (b) True
  25. 25.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
  26. 26.True or false: a sloping road is an inclined plane. (a) True (b) False
  27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
  28. 28.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
  29. 29.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
  30. 30.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a flagpole (d) a sloping road
  31. 31.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
  32. 32.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
  33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
  34. 34.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the spoon is hot (d) the lid gets softer
  35. 35.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
  36. 36.True or false: a ramp uses a pulley. (a) True (b) False
  37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
  38. 38.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
  39. 39.True or false: a balloon is needed for the ruler lever. (a) False (b) True
  40. 40.True or false: a flat table is not needed for the ruler lever. (a) True (b) False

Answer key

  1. we keep it the same
  2. a flat table
  3. they may swallow them
  4. a 30 cm ruler
  5. needed
  6. True
  7. False
  8. a round pencil
  9. the fulcrum
  10. a battery cell
  11. we keep it the same
  12. False
  13. False
  14. True
  15. 2
  16. True
  17. an inclined plane
  18. a wheel and axle
  19. False
  20. press it gently
  21. 1
  22. the right side
  23. False
  24. False
  25. False
  26. True
  27. easier
  28. 2
  29. turmeric powder
  30. a flagpole
  31. True
  32. needed
  33. True
  34. a lever boosts your push
  35. a pulley
  36. False
  37. False
  38. False
  39. False
  40. False

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