Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 847 · 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 turmeric powder for the ruler lever? (a) needed (b) not needed
2. 2.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a tap handle (c) a doorknob (d) a ramp
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
4. 4.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a battery cell (d) a 30 cm ruler
6. 6.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
7. 7.⚖️ 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
8. 8.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crowbar (c) a doorknob (d) a see-saw
9. 9.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
10. 10.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
12. 12.True or false: a slide is a wheel and axle. (a) False (b) True
13. 13.True or false: a see-saw is a wheel and axle. (a) False (b) True
14. 14.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a flat table
16. 16.🧺 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 round pencil
17. 17.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a crane (d) a see-saw
18. 18.⚖️ 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 6 cm to the right to balance it?
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a balloon (d) a flat table
20. 20.🔮 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) neither, it balances (d) the right side
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
22. 22.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
23. 23.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a round pencil (d) a 30 cm ruler
26. 26.⚖️ 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 same ruler (b) which side goes down (c) distance from the pencil (d) the number of coins
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) yeast
28. 28.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
30. 30.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) turmeric powder (d) a magnet
31. 31.⚖️ 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
32. 32.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a 30 cm ruler (d) a flat table
34. 34.True or false: a mirror is needed for the ruler lever. (a) True (b) False
35. 35.⚖️ 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
36. 36.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) a flat table (d) a 30 cm ruler
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
40. 40.⚙️ Which of these uses a pulley? (a) a doorknob (b) a sloping road (c) a crowbar (d) a flagpole

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