Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 607 · 40 questions

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.

1. 1.⚖️ 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 keep it the same (b) we measure it (c) we change it
2. 2.⚖️ 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 number of coins
3. 3.True or false: a ramp is an inclined plane. (a) False (b) True
4. 4.True or false: a steering wheel uses a pulley. (a) False (b) True
5. 5.True or false: a mirror is needed for the ruler lever. (a) False (b) True
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) True (b) False
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
9. 9.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the number of coins
11. 11.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
13. 13.🧺 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 magnet (d) a flat table
14. 14.⚖️ 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?
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
16. 16.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a mirror (d) coins of one kind
17. 17.⚖️ 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 keep it the same (c) we change it
18. 18.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crowbar (c) a crane (d) a spoon lifting a lid
19. 19.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) a 30 cm ruler
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
22. 22.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a mirror (d) a battery cell
24. 24.⚖️ 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) where the pencil is (c) the number of coins (d) the kind of coins
25. 25.True or false: a doorknob is a lever. (a) False (b) True
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 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?
27. 27.🔮 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
28. 28.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?
31. 31.True or false: yeast is needed for the ruler lever. (a) True (b) False
32. 32.True or false: a magnet is needed for the ruler lever. (a) False (b) True
33. 33.True or false: a crowbar is an inclined plane. (a) False (b) True
34. 34.⚙️ Which of these is a lever? (a) a see-saw (b) a well pulley (c) a ramp (d) a steering wheel
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) yeast
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a battery cell (d) a balloon
39. 39.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind

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