Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 250 · 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: yeast is needed for the ruler lever. (a) True (b) False
2. 2.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
3. 3.🧺 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 magnet (d) a round pencil
4. 4.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
5. 5.⚙️ Which of these uses a pulley? (a) a tap handle (b) a see-saw (c) a slide (d) a flagpole
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a mirror
8. 8.🔮 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) the left side (c) neither, it balances (d) both go up
9. 9.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
10. 10.⚖️ 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 measure it (b) we keep it the same (c) we change it
11. 11.True or false: a sloping road is an inclined plane. (a) False (b) True
12. 12.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
15. 15.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.True or false: a crane is a wheel and axle. (a) True (b) False
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
19. 19.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
20. 20.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
21. 21.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
23. 23.⚖️ 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 keep it the same (c) we change it
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the same ruler (c) the kind of coins (d) where the pencil is
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) a magnet (d) turmeric powder
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) coins of one kind
27. 27.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
28. 28.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) a flat table (d) a 30 cm ruler
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 keep it the same (c) we change it
31. 31.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a flat table (d) a round pencil
34. 34.⚖️ 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) False (b) True
35. 35.True or false: a doorknob is an inclined plane. (a) True (b) False
36. 36.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) yeast (d) a round pencil
38. 38.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
40. 40.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a mirror (d) a battery cell

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