Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 807 · 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) turmeric powder (b) yeast (c) a battery cell (d) a round pencil
2. 2.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
5. 5.🔮 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) both go up (c) the right side (d) neither, it balances
6. 6.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a round pencil (d) a 30 cm ruler
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
10. 10.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a magnet (d) a round pencil
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
13. 13.True or false: a tap handle is a wheel and axle. (a) False (b) True
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
15. 15.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
17. 17.⚖️ 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 measure it (b) we keep it the same (c) we change it
18. 18.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
20. 20.⚖️ 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
21. 21.⚙️ Which of these is a lever? (a) a steering wheel (b) a slide (c) a sloping road (d) a crowbar
22. 22.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.⚖️ 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 change it (c) we keep it the same
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
28. 28.⚖️ 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) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a battery cell (d) a flat table
31. 31.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a battery cell (d) a flat table
33. 33.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) distance from the pencil (c) the number of coins (d) the same ruler
35. 35.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
36. 36.⚙️ Which simple machine is a slide? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
37. 37.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a balloon (c) yeast (d) a 30 cm ruler
38. 38.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
39. 39.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
40. 40.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently

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