Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 432 · 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? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) the number of coins (d) where the pencil is
2. 2.🔮 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) the left side (c) both go up (d) neither, it balances
3. 3.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the same ruler
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.True or false: a steering wheel is a lever. (a) False (b) True
7. 7.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
8. 8.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) a round pencil
10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit closer to middle (d) sit farther from middle
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
13. 13.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
15. 15.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a 30 cm ruler
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
18. 18.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a well pulley (d) a crowbar
19. 19.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
20. 20.⚖️ 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) the kind of coins (c) which side goes down (d) the number of coins
21. 21.⚖️ 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 keep it the same (c) we measure it
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
24. 24.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
25. 25.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.⚖️ 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?
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
29. 29.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a sloping road (d) a crane
30. 30.⚖️ 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?
31. 31.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a flat table is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a 30 cm ruler (d) a flat table
35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
38. 38.⚖️ 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?
39. 39.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a balloon (d) coins of one kind
40. 40.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed

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