Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 341 · 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.🧺 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 mirror (d) a flat table
2. 2.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
3. 3.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) turmeric powder (d) a balloon
5. 5.🔮 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) the right side (c) both go up (d) the left side
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.⚙️ Which of these is a wheel and axle? (a) a slide (b) a sloping road (c) a tap handle (d) a crane
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 4 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.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a balloon (d) a flat table
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a round pencil (d) coins of one kind
16. 16.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down (d) where the pencil is
17. 17.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) coins of one kind
19. 19.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a ramp (d) a steering wheel
20. 20.⚖️ 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
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.True or false: a flat table is needed for the ruler lever. (a) False (b) True
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) a round pencil
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
25. 25.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
27. 27.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
33. 33.True or false: a sloping road is a lever. (a) True (b) False
34. 34.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
35. 35.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
36. 36.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a mirror (d) a balloon
37. 37.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
39. 39.⚖️ 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 number of coins (b) distance from the pencil (c) the kind of coins (d) the same ruler
40. 40.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder

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