Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 835 · 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.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
2. 2.True or false: yeast is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ 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 same ruler (b) the kind of coins (c) where the pencil is (d) which side goes down
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.True or false: a sloping road is an inclined plane. (a) False (b) True
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) the left side (b) neither, it balances (c) the right side (d) both go up
7. 7.True or false: a steering wheel is a lever. (a) False (b) True
8. 8.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a flat table (c) a 30 cm ruler (d) coins of one kind
9. 9.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) a round pencil (d) coins of one kind
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
12. 12.⚖️ 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) distance from the pencil (d) the number of coins
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) a flat table (d) a 30 cm ruler
14. 14.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a slide (d) a sloping road
15. 15.⚖️ 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?
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
18. 18.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
19. 19.True or false: a bottle opener is a wheel and axle. (a) True (b) False
20. 20.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
21. 21.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
22. 22.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
23. 23.⚖️ 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?
24. 24.True or false: a steering wheel is a wheel and axle. (a) True (b) False
25. 25.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
27. 27.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a round pencil (d) a mirror
29. 29.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
30. 30.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a see-saw (d) a crowbar
31. 31.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) True (b) False
33. 33.⚖️ 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) the spoon is hot (d) a lever boosts your push
34. 34.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a battery cell (d) coins of one kind
37. 37.⚖️ 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
38. 38.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
39. 39.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell

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