Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 31 · 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.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
2. 2.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a balloon
5. 5.🛟 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
6. 6.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
7. 7.⚖️ 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 change it (c) we keep it the same
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) a 30 cm ruler
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) which side goes down (d) the kind of coins
10. 10.True or false: a sloping road is a lever. (a) False (b) True
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 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?
12. 12.⚖️ 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
13. 13.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
14. 14.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
15. 15.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
16. 16.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) coins of one kind
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) yeast
19. 19.🔮 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) neither, it balances (c) both go up (d) the left side
20. 20.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
21. 21.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
22. 22.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
24. 24.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.⚙️ Which of these is a lever? (a) a ramp (b) a well pulley (c) a spoon lifting a lid (d) a steering wheel
27. 27.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
28. 28.True or false: a balloon 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 round pencil (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a flat table (d) a balloon
32. 32.True or false: a flat table is needed for the ruler lever. (a) True (b) False
33. 33.⚖️ 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) False (b) True
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) turmeric powder (d) a 30 cm ruler
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
38. 38.🛟 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
39. 39.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed

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