Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 923 · 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.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
2. 2.⚖️ 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) which side goes down (c) the kind of coins (d) where the pencil is
3. 3.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
4. 4.⚖️ 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 2 cm to the right to balance it?
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a flat table (d) a 30 cm ruler
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a flat table (d) coins of one kind
7. 7.⚖️ 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
8. 8.⚖️ 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) True (b) False
9. 9.🧺 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
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
11. 11.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
12. 12.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) both go up (d) the right side
13. 13.True or false: a mirror is needed for the ruler lever. (a) True (b) False
14. 14.True or false: a bottle opener is a lever. (a) True (b) False
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a battery cell
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
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) True (b) False
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
19. 19.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
22. 22.True or false: yeast is not needed for the ruler lever. (a) False (b) True
23. 23.True or false: a tap handle is a lever. (a) False (b) True
24. 24.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
26. 26.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a sloping road (c) a slide (d) a tap handle
27. 27.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) a battery cell (d) a balloon
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
31. 31.⚖️ 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?
32. 32.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a crowbar (d) a well pulley
33. 33.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.⚖️ 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) the same ruler (c) distance from the pencil
37. 37.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a round pencil (d) a 30 cm ruler
39. 39.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
40. 40.⚖️ 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 measure it (c) we change it

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