Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 808 · 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 needed for the ruler lever? (a) a magnet (b) yeast (c) a mirror (d) a 30 cm ruler
2. 2.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
3. 3.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
4. 4.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the spoon is hot (d) the lid gets softer
5. 5.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) yeast (d) a mirror
6. 6.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the right side (d) the left side
7. 7.True or false: a crowbar uses a pulley. (a) True (b) False
8. 8.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) yeast
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 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?
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
12. 12.True or false: a crowbar is a lever. (a) True (b) False
13. 13.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
15. 15.⚖️ 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
16. 16.⚖️ 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) True (b) False
17. 17.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
18. 18.True or false: a bottle opener is a wheel and axle. (a) True (b) False
19. 19.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
20. 20.🧺 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
21. 21.True or false: a see-saw is a wheel and axle. (a) True (b) False
22. 22.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
23. 23.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
25. 25.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
26. 26.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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?
28. 28.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
29. 29.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a mirror (d) turmeric powder
30. 30.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a round pencil (c) turmeric powder (d) a magnet
33. 33.⚙️ Which simple machine is a slide? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
35. 35.True or false: a well pulley uses a pulley. (a) True (b) False
36. 36.True or false: a bottle opener is a lever. (a) False (b) True
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) the same ruler (b) distance from the pencil (c) where the pencil is (d) which side goes down
38. 38.True or false: a ramp is an inclined plane. (a) False (b) True
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a battery cell
40. 40.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a steering wheel (c) a crowbar (d) a spoon lifting a lid

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