Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 272 · 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? True or false: the number of coins is the one thing we change. (a) True (b) False
2. 2.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
3. 3.True or false: a doorknob is a wheel and axle. (a) False (b) True
4. 4.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a steering wheel (d) a sloping road
5. 5.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
6. 6.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a battery cell (d) a 30 cm ruler
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
8. 8.⚖️ 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) the number of coins (d) distance from the pencil
9. 9.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a round pencil
11. 11.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
16. 16.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
17. 17.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) a round pencil
19. 19.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a battery cell (d) a 30 cm ruler
21. 21.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
22. 22.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
23. 23.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
24. 24.🧺 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 balloon (d) a 30 cm ruler
25. 25.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
26. 26.True or false: a tap handle is a wheel and axle. (a) True (b) False
27. 27.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a doorknob (c) a ramp (d) a spoon lifting a lid
28. 28.⚖️ 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) the kind of coins (c) which side goes down (d) distance from the pencil
29. 29.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) a round pencil (d) coins of one kind
31. 31.⚖️ 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) True (b) False
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) which side goes down (c) the kind of coins
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
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 measure it (b) we keep it the same (c) we change it
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) turmeric powder (d) coins of one kind
38. 38.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a mirror (d) yeast
39. 39.True or false: a well pulley is a wheel and axle. (a) True (b) False
40. 40.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle

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