Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 359 · 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) a round pencil (b) coins of one kind (c) a flat table (d) a balloon
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) yeast
4. 4.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a flat table (d) a mirror
5. 5.⚖️ 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
6. 6.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
7. 7.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a steering wheel (c) a flagpole (d) a well pulley
8. 8.True or false: a crowbar uses a pulley. (a) True (b) False
9. 9.True or false: a crane is an inclined plane. (a) False (b) True
10. 10.True or false: a sloping road is an inclined plane. (a) True (b) False
11. 11.True or false: a balloon is needed for the ruler lever. (a) False (b) True
12. 12.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
13. 13.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
15. 15.True or false: a crane is a wheel and axle. (a) False (b) True
16. 16.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🛟 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
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a round pencil (d) yeast
21. 21.True or false: yeast is not needed for the ruler lever. (a) False (b) True
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
23. 23.⚖️ 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) where the pencil is (d) the same ruler
24. 24.True or false: a flat table is needed for the ruler lever. (a) True (b) False
25. 25.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a see-saw (c) a doorknob (d) a slide
26. 26.True or false: a mirror is needed for the ruler lever. (a) True (b) False
27. 27.🔮 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) neither, it balances (c) the left side (d) both go up
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) a flat table
29. 29.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a spoon lifting a lid (d) a tap handle
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) coins of one kind
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
33. 33.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
36. 36.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a balloon (d) a 30 cm ruler
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed

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