Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 369 · 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.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) a flat table
2. 2.⚖️ 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) the same ruler (c) where the pencil is (d) the kind of coins
3. 3.🔮 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
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
5. 5.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
6. 6.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a 30 cm ruler (d) a mirror
7. 7.True or false: yeast is needed for the ruler lever. (a) False (b) True
8. 8.True or false: a slide is a lever. (a) False (b) True
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) turmeric powder
10. 10.⚖️ 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 change it (b) we keep it the same (c) we measure it
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
12. 12.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a flagpole (c) a spoon lifting a lid (d) a ramp
14. 14.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a magnet (d) yeast
15. 15.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 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.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
18. 18.⚖️ 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) False (b) True
19. 19.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) a round pencil
21. 21.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) turmeric powder (d) coins of one kind
23. 23.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
25. 25.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) a round pencil (d) a magnet
27. 27.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
28. 28.⚖️ 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 number of coins (d) the kind of coins
29. 29.⚖️ 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
30. 30.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
31. 31.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) a 30 cm ruler (d) coins of one kind
34. 34.⚖️ 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?
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
36. 36.⚖️ 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) True (b) False
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
38. 38.⚖️ 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) where the pencil is (c) which side goes down
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed

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