Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 133 · 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? Which of these is kept the same? (a) the number of coins (b) which side goes down (c) distance from the pencil
2. 2.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a magnet (d) a mirror
3. 3.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
4. 4.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a flat table (d) a battery cell
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
6. 6.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) the same (d) impossible
9. 9.⚙️ Which of these is a lever? (a) a tap handle (b) a ramp (c) a spoon lifting a lid (d) a slide
10. 10.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
11. 11.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
12. 12.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
13. 13.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the number of coins (c) distance from the pencil (d) which side goes down
15. 15.⚖️ 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 2 cm to the right to balance it?
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.True or false: a spoon lifting a lid is an inclined plane. (a) True (b) False
18. 18.⚖️ 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
19. 19.⚖️ 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 change it (c) we measure it
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ 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) where the pencil is
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
25. 25.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
27. 27.⚖️ 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
28. 28.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a round pencil (d) a flat table
30. 30.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
31. 31.🔮 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 right side (b) both go up (c) neither, it balances (d) the left side
32. 32.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
33. 33.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
36. 36.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
37. 37.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
38. 38.True or false: a bottle opener is a wheel and axle. (a) True (b) False
39. 39.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
40. 40.⚖️ 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) the kind of coins (c) which side goes down (d) distance from the pencil

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