Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 212 · 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.🔮 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
2. 2.⚖️ 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
3. 3.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
4. 4.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a magnet (d) a balloon
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
6. 6.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
8. 8.True or false: a crane is an inclined plane. (a) True (b) False
9. 9.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
10. 10.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) the number of coins (d) which side goes down
12. 12.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
13. 13.⚖️ 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) which side goes down (b) the same ruler (c) distance from the pencil (d) the number of coins
14. 14.⚙️ Which of these is a lever? (a) a see-saw (b) a steering wheel (c) a ramp (d) a sloping road
15. 15.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) coins of one kind
17. 17.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a 30 cm ruler (d) a battery cell
19. 19.True or false: a sloping road uses a pulley. (a) True (b) False
20. 20.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
22. 22.⚖️ 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 measure it (c) we change it
23. 23.⚖️ 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
24. 24.⚖️ 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) where the pencil is (c) which side goes down
25. 25.True or false: a balloon 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) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
27. 27.True or false: a steering wheel is a wheel and axle. (a) False (b) True
28. 28.True or false: a steering wheel is an inclined plane. (a) True (b) False
29. 29.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a crane (c) a flagpole (d) a doorknob
30. 30.True or false: a tap handle is a lever. (a) False (b) True
31. 31.True or false: a ramp is an inclined plane. (a) True (b) False
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a battery cell
33. 33.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a magnet
35. 35.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
36. 36.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
37. 37.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a flagpole (d) a spoon lifting a lid
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a flat table
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
40. 40.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a round pencil (d) a battery cell

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