Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 605 · 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 “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
4. 4.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a well pulley (d) a slide
5. 5.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
6. 6.🧺 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 round pencil
7. 7.🔮 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) the right side (d) both go up
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
10. 10.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
11. 11.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
14. 14.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
16. 16.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
17. 17.⚖️ 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
18. 18.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) a balloon
20. 20.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
21. 21.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
23. 23.True or false: a 30 cm ruler is needed for the ruler lever. (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 same ruler”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.⚖️ 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 kind of coins (c) which side goes down (d) distance from the pencil
26. 26.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
28. 28.True or false: a flat table is needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
30. 30.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a battery cell (d) a flat table
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) yeast (d) a 30 cm ruler
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a round pencil (d) coins of one kind
34. 34.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a round pencil (d) a mirror
35. 35.⚖️ 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 number of coins
36. 36.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
37. 37.⚙️ Which of these uses a pulley? (a) a flagpole (b) a ramp (c) a steering wheel (d) a bottle opener
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
39. 39.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind

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