Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 460 · 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? What do we do with “which side goes down”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
3. 3.True or false: yeast is not needed for the ruler lever. (a) False (b) True
4. 4.True or false: a tap handle is a wheel and axle. (a) True (b) False
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
7. 7.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a doorknob (d) a see-saw
8. 8.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a crowbar (d) a well pulley
9. 9.🔮 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 left side (b) neither, it balances (c) the right side (d) both go up
10. 10.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
11. 11.⚖️ 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 same ruler (c) which side goes down
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
13. 13.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
14. 14.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
15. 15.⚖️ 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
16. 16.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a battery cell
18. 18.⚖️ 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
19. 19.True or false: a ramp is an inclined plane. (a) False (b) True
20. 20.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) yeast (d) a magnet
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a 30 cm ruler (c) coins of one kind (d) a flat table
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
25. 25.⚖️ 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
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
27. 27.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
28. 28.True or false: a bottle opener is an inclined plane. (a) True (b) False
29. 29.⚖️ 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) the same ruler (b) which side goes down (c) the number of coins (d) distance from the pencil
30. 30.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a balloon (d) turmeric powder
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a mirror
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
33. 33.🛟 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
34. 34.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
35. 35.⚖️ 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 number of coins (c) which side goes down
36. 36.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
37. 37.True or false: a crane is a wheel and axle. (a) True (b) False
38. 38.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
40. 40.⚙️ Which of these is a lever? (a) a ramp (b) a crowbar (c) a flagpole (d) a slide

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