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Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 562 · 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.⚙️ Which of these uses a pulley? (a) a ramp (b) a doorknob (c) a flagpole (d) a bottle opener
  2. 2.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down
  3. 3.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
  4. 4.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  5. 5.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
  6. 6.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
  7. 7.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
  8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a battery cell
  9. 9.⚙️ Which of these is a lever? (a) a well pulley (b) a bottle opener (c) a sloping road (d) a crane
  10. 10.⚖️ 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) the same ruler (b) where the pencil is (c) the kind of coins (d) distance from the pencil
  11. 11.⚖️ 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 change it (c) we keep it the same
  12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the same ruler
  13. 13.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a ramp (d) a tap handle
  14. 14.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
  15. 15.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  16. 16.⚖️ 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
  17. 17.⚖️ 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) distance from the pencil (d) which side goes down
  18. 18.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
  19. 19.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
  20. 20.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a ramp (c) a well pulley (d) a bottle opener
  21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a magnet
  22. 22.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a steering wheel (c) a bottle opener (d) a well pulley
  23. 23.⚖️ 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
  24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
  25. 25.⚖️ 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
  26. 26.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
  27. 27.True or false: a bottle opener is a lever. (a) True (b) False
  28. 28.🔮 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) the right side (c) neither, it balances (d) both go up
  29. 29.True or false: a crane is an inclined plane. (a) False (b) True
  30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
  31. 31.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
  32. 32.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a tap handle (d) a crane
  33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a mirror (d) a round pencil
  34. 34.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a spoon lifting a lid (d) a doorknob
  35. 35.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
  36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) coins of one kind (d) a 30 cm ruler
  37. 37.True or false: a doorknob is a wheel and axle. (a) False (b) True
  38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
  39. 39.⚖️ 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 keep it the same (c) we change it
  40. 40.⚖️ 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

Answer key

  1. a flagpole
  2. the number of coins
  3. they may swallow them
  4. 4
  5. 3
  6. press it gently
  7. turmeric powder
  8. a battery cell
  9. a bottle opener
  10. distance from the pencil
  11. we keep it the same
  12. the same ruler
  13. a ramp
  14. needed
  15. 10
  16. True
  17. which side goes down
  18. not needed
  19. True
  20. a well pulley
  21. a magnet
  22. a steering wheel
  23. False
  24. equal on both sides
  25. False
  26. not needed
  27. True
  28. the right side
  29. False
  30. 6
  31. an inclined plane
  32. a crane
  33. a mirror
  34. a spoon lifting a lid
  35. easier
  36. yeast
  37. True
  38. a balloon
  39. we change it
  40. False

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