Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 688 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
2. 2.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) coins of one kind (d) a magnet
3. 3.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a balloon (d) a 30 cm ruler
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
5. 5.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
6. 6.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a crowbar (d) a tap handle
7. 7.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
9. 9.True or false: a crowbar is an inclined plane. (a) False (b) True
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a 30 cm ruler (d) a round pencil
11. 11.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a mirror (d) a magnet
12. 12.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
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) both go up (c) the right side (d) the left side
14. 14.⚖️ 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) which side goes down (c) where the pencil is (d) the number of coins
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) always 10 (d) zero
16. 16.⚙️ Which of these is a lever? (a) a slide (b) a sloping road (c) a well pulley (d) a see-saw
17. 17.⚖️ 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 4 cm to the right to balance it?
18. 18.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a sloping road (c) a tap handle (d) a crowbar
19. 19.⚖️ 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) the same ruler (c) where the pencil is (d) which side goes down
20. 20.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
23. 23.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
25. 25.True or false: a mirror is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) yeast (d) a round pencil
27. 27.⚖️ 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) where the pencil is
28. 28.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a steering wheel (c) a flagpole (d) a crowbar
29. 29.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a round pencil (d) a mirror
30. 30.⚖️ 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) True (b) False
31. 31.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
32. 32.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
33. 33.True or false: yeast is not needed for the ruler lever. (a) True (b) False
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a round pencil (d) a flat table
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.⚖️ 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
38. 38.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 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? What do we do with “distance from the pencil”? (a) we keep it the same (b) we measure it (c) we change it

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