Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 600 · 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.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) neither, it balances (c) both go up (d) the right side
2. 2.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
5. 5.⚖️ 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 same ruler (b) the number of coins (c) which side goes down (d) where the pencil is
6. 6.⚖️ 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
7. 7.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a flat table (d) a round pencil
9. 9.⚖️ 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 change it (b) we keep it the same (c) we measure it
10. 10.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a crowbar (d) a well pulley
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a battery cell (d) a 30 cm ruler
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
13. 13.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
14. 14.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a mirror
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
18. 18.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a flat table (d) coins of one kind
19. 19.⚖️ 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 keep it the same (b) we change it (c) we measure it
20. 20.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) a battery cell (d) yeast
21. 21.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
22. 22.🧺 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
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
24. 24.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a 30 cm ruler
26. 26.⚖️ 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
27. 27.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
28. 28.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crowbar (c) a steering wheel (d) a slide
29. 29.⚖️ 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) distance from the pencil (b) the same ruler (c) the number of coins (d) the kind of coins
30. 30.⚖️ 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 magnetic (c) the lid gets softer (d) the spoon is hot
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a mirror is needed for the ruler lever. (a) True (b) False
33. 33.True or false: a flagpole uses a pulley. (a) True (b) False
34. 34.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a flat table (d) coins of one kind
36. 36.⚖️ 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) True (b) False
37. 37.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a ramp (c) a see-saw (d) a crane
38. 38.True or false: a see-saw is an inclined plane. (a) True (b) False
39. 39.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
40. 40.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley

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