Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 706 · 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? What do we do with “where the pencil is”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
3. 3.⚙️ Which of these uses a pulley? (a) a flagpole (b) a crowbar (c) a ramp (d) a bottle opener
4. 4.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a balloon (d) coins of one kind
5. 5.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
6. 6.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
7. 7.True or false: a see-saw is a wheel and axle. (a) False (b) True
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a magnet
10. 10.🔮 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 left side (c) both go up (d) the right side
11. 11.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
12. 12.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a well pulley (d) a slide
14. 14.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
15. 15.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
16. 16.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a slide (c) a doorknob (d) a crane
17. 17.⚖️ 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) False (b) True
18. 18.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
19. 19.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit closer to middle (d) sit farther from middle
20. 20.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
21. 21.⚖️ 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) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a round pencil (d) a flat table
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
24. 24.⚖️ 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) False (b) True
25. 25.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
26. 26.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ 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) distance from the pencil (d) which side goes down
29. 29.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a ramp (c) a see-saw (d) a sloping road
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
31. 31.⚖️ 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
32. 32.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a round pencil (c) a magnet (d) a balloon
33. 33.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a sloping road (c) a steering wheel (d) a crowbar
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a magnet (d) a round pencil
35. 35.⚖️ 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 change it (c) we measure it
36. 36.⚖️ 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?
37. 37.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a flat table
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
40. 40.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a magnet (d) a battery cell

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