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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 195 · 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.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
  2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
  3. 3.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
  4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
  5. 5.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a doorknob (d) a see-saw
  6. 6.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a well pulley (d) a crowbar
  7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
  8. 8.True or false: a crane is a lever. (a) False (b) True
  9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
  10. 10.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
  11. 11.True or false: a bottle opener is a lever. (a) False (b) True
  12. 12.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
  13. 13.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
  14. 14.True or false: a well pulley is a lever. (a) True (b) False
  15. 15.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
  16. 16.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  17. 17.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
  18. 18.True or false: a sloping road is a wheel and axle. (a) False (b) True
  19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
  20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
  21. 21.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
  22. 22.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a flagpole (c) a see-saw (d) a crowbar
  23. 23.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
  24. 24.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
  25. 25.True or false: a crowbar is a wheel and axle. (a) False (b) True
  26. 26.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
  27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
  28. 28.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
  29. 29.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
  30. 30.True or false: a ramp is an inclined plane. (a) False (b) True
  31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
  32. 32.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
  33. 33.True or false: a flagpole is a lever. (a) False (b) True
  34. 34.⚖️ 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
  35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
  36. 36.True or false: a steering wheel is an inclined plane. (a) True (b) False
  37. 37.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
  38. 38.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we keep it the same (c) we change it
  39. 39.⚙️ Which of these is a lever? (a) a well pulley (b) a flagpole (c) a see-saw (d) a sloping road
  40. 40.True or false: a bottle opener is an inclined plane. (a) False (b) True

Answer key

  1. needed
  2. we keep it the same
  3. True
  4. 5
  5. a well pulley
  6. a crowbar
  7. needed
  8. False
  9. we change it
  10. a pulley
  11. True
  12. not needed
  13. a magnet
  14. False
  15. a wheel and axle
  16. an inclined plane
  17. not needed
  18. False
  19. 6
  20. which side goes down
  21. the fulcrum
  22. a steering wheel
  23. press it gently
  24. False
  25. False
  26. they may swallow them
  27. easier
  28. True
  29. not needed
  30. True
  31. 3
  32. a wheel and axle
  33. False
  34. True
  35. yeast
  36. False
  37. a lever
  38. we keep it the same
  39. a see-saw
  40. False

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