Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 490 · 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 simple machine is a doorknob? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
2. 2.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ 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 change it (b) we measure it (c) we keep it the same
4. 4.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) True (b) False
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.⚖️ 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
9. 9.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
10. 10.⚖️ 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
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
13. 13.🔮 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) the right side (d) both go up
14. 14.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a round pencil (d) turmeric powder
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a 30 cm ruler (d) a flat table
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a mirror (d) coins of one kind
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) the same ruler (b) the number of coins (c) which side goes down (d) distance from the pencil
20. 20.⚙️ Which of these uses a pulley? (a) a flagpole (b) a bottle opener (c) a spoon lifting a lid (d) a crowbar
21. 21.True or false: a tap handle is a wheel and axle. (a) True (b) False
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
24. 24.True or false: a bottle opener is an inclined plane. (a) True (b) False
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
26. 26.⚖️ 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
27. 27.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
28. 28.True or false: a doorknob is a lever. (a) True (b) False
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
30. 30.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) yeast (d) turmeric powder
31. 31.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
32. 32.⚙️ Which of these is a wheel and axle? (a) a crane (b) a spoon lifting a lid (c) a steering wheel (d) a ramp
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
34. 34.⚖️ 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?
35. 35.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) coins of one kind (d) a magnet
38. 38.⚖️ 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) where the pencil is (c) distance from the pencil (d) which side goes down
39. 39.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
40. 40.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True

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