Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 935 · 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.⚖️ 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
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) the number of coins (b) the same ruler (c) distance from the pencil (d) where the pencil is
3. 3.True or false: yeast is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) a 30 cm ruler
5. 5.🧺 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) a balloon
6. 6.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) coins of one kind (d) a mirror
7. 7.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a balloon (d) a battery cell
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
10. 10.⚙️ Which of these is a lever? (a) a bottle opener (b) a flagpole (c) a ramp (d) a doorknob
11. 11.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
13. 13.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a sloping road (d) a tap handle
14. 14.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a sloping road (c) a doorknob (d) a flagpole
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a round pencil (d) a flat table
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
20. 20.🔮 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 right side (b) neither, it balances (c) the left side (d) both go up
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) coins of one kind (d) a round pencil
22. 22.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) coins of one kind (d) a 30 cm ruler
25. 25.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
27. 27.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
28. 28.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
29. 29.⚖️ 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 closer to middle (d) sit farther from middle
30. 30.True or false: a see-saw is an inclined plane. (a) True (b) False
31. 31.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a mirror (d) a round pencil
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) a flat table
33. 33.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
34. 34.⚖️ 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
35. 35.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
36. 36.⚖️ 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) distance from the pencil (c) which side goes down (d) the same ruler
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a ramp (c) a doorknob (d) a see-saw
39. 39.⚖️ 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
40. 40.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold

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