Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 891 · 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.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
2. 2.⚖️ 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 number of coins (c) the same ruler (d) distance from the pencil
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
4. 4.⚖️ 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 farther from middle (d) sit closer to middle
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🧺 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) turmeric powder
7. 7.True or false: a steering wheel is a wheel and axle. (a) False (b) True
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) which side goes down (c) distance from the pencil
9. 9.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
10. 10.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a flat table
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
15. 15.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
16. 16.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a magnet (d) yeast
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a mirror (d) turmeric powder
19. 19.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a doorknob (c) a crane (d) a sloping road
20. 20.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a balloon (d) a 30 cm ruler
21. 21.True or false: a tap handle uses a pulley. (a) True (b) False
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
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 measure it (b) we keep it the same (c) we change it
25. 25.⚖️ 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) True (b) False
26. 26.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the load (d) the effort
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a flat table (d) coins of one kind
29. 29.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a bottle opener (d) a doorknob
30. 30.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
32. 32.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
33. 33.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a slide (c) a see-saw (d) a bottle opener
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
36. 36.True or false: a well pulley is a wheel and axle. (a) True (b) False
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
39. 39.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
40. 40.⚖️ 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) distance from the pencil (c) the same ruler

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