Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 511 · 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.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they may swallow them (d) they are magnetic
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
5. 5.True or false: a magnet is needed for the ruler lever. (a) True (b) False
6. 6.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) the number of coins (d) where the pencil is
8. 8.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
9. 9.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crane (c) a steering wheel (d) a slide
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) a lever boosts your push (d) the spoon is hot
12. 12.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 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) coins of one kind
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
15. 15.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a battery cell
18. 18.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
19. 19.True or false: a ramp is a wheel and axle. (a) False (b) True
20. 20.🧺 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 balloon (d) a flat table
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
23. 23.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a crowbar (d) a crane
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a round pencil (d) a mirror
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.True or false: a crane uses a pulley. (a) False (b) True
28. 28.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a round pencil
29. 29.True or false: a slide uses a pulley. (a) True (b) False
30. 30.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
35. 35.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
36. 36.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a balloon (d) coins of one kind
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the same ruler
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a round pencil (d) a 30 cm ruler
39. 39.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil

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