Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 648 · 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.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
2. 2.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
3. 3.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
4. 4.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) turmeric powder (d) a magnet
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
9. 9.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
11. 11.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
12. 12.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
13. 13.True or false: a spoon lifting a lid is a lever. (a) False (b) True
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit on the middle (d) sit farther from middle
15. 15.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a steering wheel (c) a slide (d) a see-saw
16. 16.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) yeast (d) a magnet
17. 17.True or false: a magnet is needed for the ruler lever. (a) False (b) True
18. 18.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
20. 20.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
23. 23.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ 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) the number of coins (c) distance from the pencil (d) where the pencil is
25. 25.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a tap handle (d) a spoon lifting a lid
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
27. 27.True or false: a see-saw is a lever. (a) True (b) False
28. 28.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a mirror
30. 30.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a battery cell
32. 32.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
33. 33.🧺 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) yeast
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
35. 35.True or false: a crane is an inclined plane. (a) False (b) True
36. 36.🧺 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
37. 37.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
38. 38.True or false: a crowbar is a lever. (a) False (b) True
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) coins of one kind

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