Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 114 · 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 “distance from the pencil”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.⚖️ 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
3. 3.True or false: a mirror is needed for the ruler lever. (a) True (b) False
4. 4.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
5. 5.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
7. 7.True or false: a bottle opener is a lever. (a) False (b) True
8. 8.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
9. 9.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
10. 10.True or false: a crowbar is a wheel and axle. (a) True (b) False
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
13. 13.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
15. 15.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) yeast (d) a 30 cm ruler
16. 16.⚖️ 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
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) a flat table (d) coins of one kind
18. 18.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a magnet
19. 19.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
20. 20.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a well pulley (d) a sloping road
21. 21.⚖️ 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) where the pencil is (b) distance from the pencil (c) the same ruler (d) the kind of coins
22. 22.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
23. 23.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
24. 24.⚖️ 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 measure it (c) we keep it the same
25. 25.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a round pencil
27. 27.🧺 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) coins of one kind
28. 28.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
29. 29.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a mirror
32. 32.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
33. 33.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
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) the number of coins (b) which side goes down (c) distance from the pencil (d) where the pencil is
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a round pencil
36. 36.⚖️ 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
37. 37.⚖️ 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) True (b) False
38. 38.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
40. 40.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a doorknob (c) a tap handle (d) a slide

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