Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 597 · 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 what we measure? (a) where the pencil is (b) the number of coins (c) the same ruler (d) which side goes down
2. 2.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
3. 3.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
4. 4.🧺 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 balloon
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler
6. 6.⚖️ 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
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
8. 8.⚖️ 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
9. 9.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
10. 10.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
12. 12.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a flat table (d) a balloon
13. 13.🔮 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) both go up (d) the right side
14. 14.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
15. 15.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
16. 16.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
17. 17.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
18. 18.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a flagpole (d) a steering wheel
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) yeast (d) a 30 cm ruler
23. 23.⚖️ 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) which side goes down (d) the kind of coins
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
25. 25.True or false: a bottle opener is a lever. (a) True (b) False
26. 26.True or false: a mirror is needed for the ruler lever. (a) False (b) True
27. 27.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a balloon (d) a 30 cm ruler
28. 28.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a balloon (d) a battery cell
29. 29.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a steering wheel (c) a slide (d) a well pulley
30. 30.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
31. 31.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a round pencil (d) a magnet
32. 32.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
33. 33.⚖️ 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
34. 34.⚖️ 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
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
36. 36.True or false: a crowbar uses a pulley. (a) False (b) True
37. 37.True or false: a tap handle uses a pulley. (a) False (b) True
38. 38.True or false: a tap handle is a wheel and axle. (a) False (b) True
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the kind of coins

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