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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 470 · 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.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
  2. 2.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
  3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
  4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
  5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we change it (c) we keep it the same
  6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) distance from the pencil (b) which side goes down (c) the same ruler (d) the kind of coins
  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.⚖️ 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
  9. 9.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
  10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) distance from the pencil (d) the same ruler
  11. 11.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
  12. 12.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
  13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
  14. 14.🔮 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) both go up (c) neither, it balances (d) the right side
  15. 15.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
  16. 16.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
  17. 17.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
  18. 18.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a well pulley (c) a sloping road (d) a see-saw
  19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) yeast
  20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
  21. 21.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
  22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “where the pencil is”? (a) we keep it the same (b) we measure it (c) we change it
  23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) turmeric powder
  24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) a mirror
  25. 25.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
  26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
  27. 27.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
  28. 28.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a round pencil (d) a balloon
  29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
  30. 30.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a bottle opener (d) a sloping road
  31. 31.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
  32. 32.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  33. 33.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
  34. 34.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
  35. 35.⚖️ 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) True (b) False
  36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) which side goes down (c) distance from the pencil
  37. 37.True or false: a flat table is needed for the ruler lever. (a) False (b) True
  38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
  39. 39.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
  40. 40.True or false: a crane uses a pulley. (a) True (b) False

Answer key

  1. True
  2. equal on both sides
  3. the fulcrum
  4. False
  5. we change it
  6. distance from the pencil
  7. a wheel and axle
  8. we keep it the same
  9. 6
  10. which side goes down
  11. not needed
  12. True
  13. a lever boosts your push
  14. the right side
  15. needed
  16. they may swallow them
  17. not needed
  18. a well pulley
  19. yeast
  20. True
  21. not needed
  22. we keep it the same
  23. turmeric powder
  24. a mirror
  25. True
  26. False
  27. a lever
  28. a round pencil
  29. 2
  30. a flagpole
  31. press it gently
  32. 12
  33. an inclined plane
  34. yeast
  35. True
  36. the kind of coins
  37. True
  38. False
  39. True
  40. True

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