Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 958 · 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 same ruler”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
3. 3.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a round pencil (d) a flat table
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
5. 5.🧺 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) a mirror
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) where the pencil is (b) the number of coins (c) which side goes down (d) distance from the pencil
7. 7.⚖️ 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
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) a lever boosts your push (d) the spoon is magnetic
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) turmeric powder
10. 10.⚖️ 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
11. 11.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a slide (c) a well pulley (d) a steering wheel
12. 12.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
13. 13.🔮 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) neither, it balances (c) the right side (d) the left side
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
15. 15.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
16. 16.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
17. 17.🧺 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) a magnet
18. 18.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) a balloon
20. 20.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a flat table (d) a mirror
21. 21.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a slide (d) a spoon lifting a lid
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a battery cell
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
25. 25.⚖️ 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) False (b) True
26. 26.True or false: a flat table is needed for the ruler lever. (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 kept the same. (a) True (b) False
28. 28.⚖️ 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 same ruler (b) distance from the pencil (c) the number of coins (d) which side goes down
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
32. 32.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a round pencil
34. 34.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
38. 38.True or false: a see-saw uses a pulley. (a) True (b) False
39. 39.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a crowbar (d) a doorknob
40. 40.⚙️ Which of these is a lever? (a) a see-saw (b) a doorknob (c) a flagpole (d) a steering wheel

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