Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 223 · 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.True or false: a ramp is a wheel and axle. (a) False (b) True
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a balloon (d) a round pencil
4. 4.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a crane (d) a steering wheel
5. 5.⚖️ 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) True (b) False
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a balloon (d) a 30 cm ruler
7. 7.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a doorknob (c) a flagpole (d) a sloping road
8. 8.⚖️ 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 number of coins (b) which side goes down (c) where the pencil is (d) the same ruler
9. 9.⚖️ 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 magnetic (d) the spoon is hot
10. 10.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) a round pencil (d) yeast
11. 11.True or false: yeast is needed for the ruler lever. (a) False (b) True
12. 12.⚖️ 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
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
14. 14.True or false: yeast is not needed for the ruler lever. (a) True (b) False
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) bigger on the left (d) zero
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a mirror (d) a balloon
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
20. 20.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) turmeric powder (d) a battery cell
21. 21.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) yeast
23. 23.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
24. 24.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
25. 25.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
26. 26.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
28. 28.True or false: a mirror is needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a sloping road (c) a ramp (d) a flagpole
30. 30.🧺 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 magnet
31. 31.True or false: a crowbar is a lever. (a) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
34. 34.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) turmeric powder
36. 36.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
37. 37.⚖️ 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) distance from the pencil (c) the kind of coins (d) the same ruler
38. 38.⚖️ 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
39. 39.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?

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