Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 252 · 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) distance from the pencil (b) which side goes down (c) the same ruler
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a mirror
3. 3.True or false: a flat table is needed for the ruler lever. (a) False (b) True
4. 4.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
5. 5.🛟 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
6. 6.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
7. 7.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a flat table (d) a mirror
9. 9.⚖️ 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?
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) which side goes down (c) the kind of coins (d) the same ruler
11. 11.⚖️ 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) the spoon is magnetic (d) a lever boosts your push
12. 12.True or false: a crowbar uses a pulley. (a) True (b) False
13. 13.⚖️ 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?
14. 14.⚖️ 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) the kind of coins (c) which side goes down
15. 15.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a flat table (d) coins of one kind
17. 17.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
18. 18.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
19. 19.⚖️ 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
20. 20.True or false: a doorknob uses a pulley. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
23. 23.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
24. 24.⚖️ 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
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a magnet
28. 28.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a magnet (d) yeast
29. 29.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a crane (d) a steering wheel
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
31. 31.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
32. 32.🔮 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 left side (c) the right side (d) both go up
33. 33.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) turmeric powder (d) a round pencil
34. 34.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
35. 35.True or false: a sloping road is an inclined plane. (a) True (b) False
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.⚖️ 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 number of coins (c) which side goes down (d) where the pencil is
38. 38.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
39. 39.⚖️ 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 1 cm to the right to balance it?
40. 40.True or false: yeast is needed for the ruler lever. (a) True (b) False

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