Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 667 · 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 mirror is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.⚙️ Which of these is a wheel and axle? (a) a crane (b) a crowbar (c) a slide (d) a tap handle
4. 4.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: a bottle opener is a lever. (a) True (b) False
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
9. 9.True or false: a crane uses a pulley. (a) True (b) False
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
11. 11.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a see-saw (c) a crane (d) a doorknob
12. 12.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) yeast (d) a mirror
13. 13.⚖️ 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?
14. 14.True or false: a tap handle is a lever. (a) True (b) False
15. 15.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) yeast (d) turmeric powder
16. 16.🧺 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
17. 17.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
18. 18.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
19. 19.⚖️ 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
20. 20.🧺 Do we need a 30 cm ruler 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: which side goes down is what we measure. (a) True (b) False
22. 22.⚖️ 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
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
26. 26.True or false: a tap handle is a wheel and axle. (a) False (b) True
27. 27.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a 30 cm ruler (d) a flat table
28. 28.True or false: a flagpole is an inclined plane. (a) True (b) False
29. 29.⚖️ 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
30. 30.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
31. 31.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a spoon lifting a lid is a lever. (a) False (b) True
33. 33.⚖️ 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
34. 34.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a round pencil (d) a 30 cm ruler
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
40. 40.⚖️ 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

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