Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 783 · 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.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a steering wheel (d) a slide
2. 2.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) turmeric powder (d) a magnet
3. 3.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a ramp (d) a steering wheel
4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a flat table (d) a balloon
5. 5.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
7. 7.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
9. 9.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) turmeric powder (d) coins of one kind
10. 10.True or false: a see-saw is a lever. (a) True (b) False
11. 11.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
12. 12.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
13. 13.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a magnet (d) a balloon
14. 14.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) yeast (d) a round pencil
16. 16.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
18. 18.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
19. 19.⚖️ 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) distance from the pencil (b) the same ruler (c) where the pencil is (d) which side goes down
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell
21. 21.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
22. 22.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a balloon (d) a 30 cm ruler
24. 24.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
25. 25.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
26. 26.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
27. 27.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a magnet (d) a flat table
30. 30.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ 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
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
34. 34.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a doorknob (d) a crane
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
36. 36.🧺 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 round pencil (d) turmeric powder
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a crane
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) a flat table
40. 40.True or false: a bottle opener uses a pulley. (a) False (b) True

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