Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 24 · 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.🧺 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) turmeric powder
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) yeast
3. 3.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
6. 6.🔮 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) both go up (c) neither, it balances (d) the right side
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
9. 9.⚖️ 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 kind of coins (c) distance from the pencil (d) the same ruler
10. 10.⚖️ 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 keep it the same (c) we measure it
11. 11.⚙️ Which of these uses a pulley? (a) a tap handle (b) a spoon lifting a lid (c) a crane (d) a steering wheel
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a 30 cm ruler (d) yeast
16. 16.⚖️ 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?
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
18. 18.⚖️ 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
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a flat table (d) a round pencil
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
23. 23.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
24. 24.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
25. 25.🧺 Which of these is needed for the ruler lever? (a) yeast (b) coins of one kind (c) a battery cell (d) a mirror
26. 26.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
27. 27.🧺 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 flat table (d) a battery cell
28. 28.True or false: a see-saw is an inclined plane. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) a flat table (d) a 30 cm ruler
30. 30.True or false: a ramp is an inclined plane. (a) False (b) True
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
32. 32.⚖️ 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
33. 33.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
34. 34.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a crane (d) a crowbar
36. 36.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
37. 37.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
38. 38.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a slide (c) a ramp (d) a doorknob
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 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?

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