Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 959 · 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.⚖️ 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
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a balloon
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
5. 5.⚖️ 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) True (b) False
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) where the pencil is (c) distance from the pencil
7. 7.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a balloon (d) a round pencil
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
10. 10.⚖️ 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
11. 11.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
12. 12.⚖️ 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) the same ruler (c) which side goes down
13. 13.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
15. 15.⚖️ 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
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
17. 17.⚙️ Which of these uses a pulley? (a) a sloping road (b) a see-saw (c) a spoon lifting a lid (d) a well pulley
18. 18.⚙️ Which of these is a lever? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a well pulley
19. 19.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.⚖️ 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) False (b) True
21. 21.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) a flat table
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
23. 23.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a crane (d) a steering wheel
24. 24.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
25. 25.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) yeast (d) a 30 cm ruler
26. 26.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
28. 28.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
30. 30.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
32. 32.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
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) coins of one kind (d) a mirror
36. 36.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a mirror (d) a magnet
37. 37.True or false: a crowbar uses a pulley. (a) True (b) False
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 30 cm ruler (d) a round pencil
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
40. 40.⚖️ 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) which side goes down (b) the same ruler (c) distance from the pencil (d) the number of coins

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