Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 463 · 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 the one thing we change? (a) the number of coins (b) which side goes down (c) distance from the pencil (d) the same ruler
2. 2.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
4. 4.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) both go up (d) the left side
5. 5.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a bottle opener (c) a slide (d) a steering wheel
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 measure it (b) we change it (c) we keep it the same
7. 7.🧺 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 balloon (d) a 30 cm ruler
8. 8.⚙️ Which of these is a lever? (a) a tap handle (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
10. 10.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) equal on both sides (d) always 10
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
13. 13.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the lid gets softer (d) the spoon is magnetic
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a magnet
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
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 keep it the same (b) we measure it (c) we change it
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.True or false: a flat table is needed for the ruler lever. (a) False (b) True
22. 22.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
23. 23.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
24. 24.True or false: a mirror is needed for the ruler lever. (a) False (b) True
25. 25.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a battery cell (d) turmeric powder
26. 26.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
27. 27.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
28. 28.🧺 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
29. 29.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
30. 30.True or false: yeast is not needed for the ruler lever. (a) False (b) True
31. 31.True or false: a magnet is needed for the ruler lever. (a) False (b) True
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a 30 cm ruler
33. 33.⚖️ 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 keep it the same (b) we change it (c) we measure it
34. 34.⚖️ 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 6 cm to the right to balance it?
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) coins of one kind (d) a mirror
37. 37.⚖️ 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 kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
38. 38.⚖️ 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) False (b) True
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 measure it (b) we change it (c) we keep it the same
40. 40.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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