Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 662 · 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.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) turmeric powder (d) a flat table
2. 2.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
3. 3.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
4. 4.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
5. 5.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
6. 6.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
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 kind of coins (b) the same ruler (c) the number of coins (d) which side goes down
9. 9.True or false: a see-saw uses a pulley. (a) False (b) True
10. 10.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
12. 12.True or false: a steering wheel uses a pulley. (a) True (b) False
13. 13.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
14. 14.⚖️ 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
15. 15.⚖️ 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) True (b) False
16. 16.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a balloon (d) coins of one kind
17. 17.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
18. 18.⚙️ Which of these is a lever? (a) a crowbar (b) a crane (c) a slide (d) a flagpole
19. 19.True or false: a balloon is needed for the ruler lever. (a) True (b) False
20. 20.True or false: a crane uses a pulley. (a) True (b) False
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
22. 22.⚖️ 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
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
25. 25.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a sloping road (c) a crowbar (d) a well pulley
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.True or false: a steering wheel is a wheel and axle. (a) False (b) True
28. 28.⚖️ 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 change it (b) we keep it the same (c) we measure it
29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
30. 30.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ 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 1 cm to the right to balance it?
32. 32.🧺 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 flat table
33. 33.⚖️ 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 kind of coins (c) which side goes down
34. 34.⚖️ 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 6 cm to the right to balance it?
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
37. 37.🔮 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) neither, it balances (c) the right side (d) the left side
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.True or false: a magnet is needed for the ruler lever. (a) False (b) True
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a magnet

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