Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 644 · 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) a 30 cm ruler (b) a battery cell (c) a flat table (d) coins of one kind
2. 2.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a see-saw (c) a spoon lifting a lid (d) a crowbar
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
5. 5.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a flat table (d) coins of one kind
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
9. 9.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) coins of one kind (d) a mirror
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a flat table (d) turmeric powder
12. 12.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
13. 13.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) yeast (d) a balloon
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
16. 16.⚖️ 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) False (b) True
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
20. 20.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a balloon (d) turmeric powder
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
22. 22.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
23. 23.⚖️ 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) distance from the pencil (b) where the pencil is (c) the number of coins (d) the kind of coins
24. 24.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
25. 25.True or false: a see-saw is a lever. (a) False (b) True
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
28. 28.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
29. 29.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
30. 30.⚖️ 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) True (b) False
31. 31.⚙️ Which of these is a lever? (a) a see-saw (b) a flagpole (c) a tap handle (d) a slide
32. 32.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
33. 33.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
34. 34.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
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 what we measure. (a) False (b) True
36. 36.⚖️ 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?
37. 37.True or false: a magnet is needed for the ruler lever. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
39. 39.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a crane (d) a bottle opener
40. 40.⚖️ 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

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