Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 566 · 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.True or false: a ramp is a lever. (a) True (b) False
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
3. 3.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
4. 4.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) turmeric powder (d) a magnet
5. 5.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 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?
7. 7.🧺 Do we need a magnet 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? What do we do with “which side goes down”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.⚖️ 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
10. 10.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
11. 11.🛟 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
12. 12.⚖️ 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) the kind of coins (c) which side goes down (d) where the pencil is
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) coins of one kind
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) turmeric powder
15. 15.⚖️ 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) which side goes down (c) distance from the pencil
16. 16.True or false: yeast is needed for the ruler lever. (a) True (b) False
17. 17.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a mirror (d) a flat table
18. 18.⚖️ 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?
19. 19.⚖️ 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?
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 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?
21. 21.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
22. 22.⚖️ 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 kind of coins (c) the number of coins (d) distance from the pencil
23. 23.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a steering wheel (d) a sloping road
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
28. 28.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crane (c) a crowbar (d) a tap handle
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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) False (b) True
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
34. 34.⚖️ 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?
35. 35.True or false: a sloping road is a lever. (a) False (b) True
36. 36.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a steering wheel (d) a see-saw
37. 37.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a battery cell (d) a round pencil
39. 39.⚖️ 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
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False

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