Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 650 · 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.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
2. 2.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
3. 3.⚙️ Which of these uses a pulley? (a) a see-saw (b) a ramp (c) a doorknob (d) a well pulley
4. 4.⚖️ 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 keep it the same (c) we measure it
5. 5.True or false: yeast is needed for the ruler lever. (a) False (b) True
6. 6.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) coins of one kind
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
9. 9.⚖️ 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) the same ruler (c) which side goes down
10. 10.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
11. 11.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
12. 12.⚖️ 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 kind of coins (b) the same ruler (c) where the pencil is (d) distance from the pencil
13. 13.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) a magnet
14. 14.True or false: a steering wheel is a wheel and axle. (a) False (b) True
15. 15.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a sloping road (c) a steering wheel (d) a well pulley
16. 16.🧺 Do we need a battery cell 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? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) the same ruler (d) which side goes down
18. 18.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) turmeric powder
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a mirror (d) a 30 cm ruler
21. 21.⚖️ 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 measure it (b) we keep it the same (c) we change it
22. 22.🔮 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 left side (b) neither, it balances (c) both go up (d) the right side
23. 23.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
24. 24.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a doorknob (c) a ramp (d) a crowbar
25. 25.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
26. 26.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
27. 27.⚖️ 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
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) coins of one kind (d) a flat table
29. 29.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) coins of one kind (d) a flat table
32. 32.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
33. 33.⚖️ 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
34. 34.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a sloping road (c) a doorknob (d) a spoon lifting a lid
35. 35.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
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) distance from the pencil (b) which side goes down (c) the kind of coins
37. 37.True or false: a tap handle is a lever. (a) False (b) True
38. 38.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
39. 39.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
40. 40.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed

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