Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 679 · 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.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
2. 2.True or false: a flat table is needed for the ruler lever. (a) False (b) True
3. 3.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
4. 4.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) a flat table (d) a balloon
5. 5.True or false: a doorknob is an inclined plane. (a) True (b) False
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.⚖️ 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
9. 9.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
10. 10.True or false: a tap handle is a wheel and axle. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
12. 12.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
13. 13.True or false: yeast is not needed for the ruler lever. (a) True (b) False
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
15. 15.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
16. 16.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
17. 17.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
19. 19.⚖️ 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) where the pencil is (b) the same ruler (c) the kind of coins (d) distance from the pencil
20. 20.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a 30 cm ruler (d) a flat table
22. 22.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
24. 24.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a ramp (d) a tap handle
25. 25.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) neither, it balances (d) the right side
26. 26.True or false: a steering wheel is an inclined plane. (a) False (b) True
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
28. 28.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
29. 29.True or false: a ramp is an inclined plane. (a) False (b) True
30. 30.⚖️ 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 change it (b) we keep it the same (c) we measure it
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
33. 33.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a crowbar (d) a tap handle
34. 34.🛟 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
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
36. 36.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
37. 37.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a steering wheel (d) a tap handle
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
40. 40.True or false: a battery cell is needed for the ruler lever. (a) False (b) True

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