Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 893 · 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 tap handle uses a pulley. (a) True (b) False
2. 2.⚖️ 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) which side goes down (b) distance from the pencil (c) the same ruler (d) the number of coins
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) a flat table
4. 4.True or false: a balloon is needed for the ruler lever. (a) True (b) False
5. 5.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a flat table (d) coins of one kind
7. 7.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
10. 10.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a bottle opener (c) a ramp (d) a doorknob
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a flat table
12. 12.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a spoon lifting a lid (d) a slide
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
14. 14.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
15. 15.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
16. 16.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
17. 17.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crowbar (c) a doorknob (d) a flagpole
18. 18.True or false: a see-saw is a wheel and axle. (a) True (b) False
19. 19.True or false: a see-saw is a lever. (a) False (b) True
20. 20.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
22. 22.🔮 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 left side (d) the right side
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a magnet (d) a round pencil
24. 24.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
25. 25.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a tap handle (d) a ramp
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the effort (d) the fulcrum
28. 28.⚖️ 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 change it (b) we keep it the same (c) we measure it
29. 29.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
30. 30.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a battery cell (d) a round pencil
32. 32.True or false: a slide is an inclined plane. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚖️ 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?
35. 35.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?

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