Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 92 · 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 change it (c) we measure it
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a balloon
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) which side goes down (c) distance from the pencil
4. 4.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
6. 6.⚖️ 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) the number of coins (c) distance from the pencil
7. 7.True or false: a magnet is needed for the ruler lever. (a) True (b) False
8. 8.True or false: a balloon is needed for the ruler lever. (a) False (b) True
9. 9.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) yeast (d) a 30 cm ruler
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a flat table (d) a round pencil
13. 13.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a mirror (d) a battery cell
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) turmeric powder
15. 15.🔮 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) the right side (c) the left side (d) neither, it balances
16. 16.⚙️ Which of these uses a pulley? (a) a see-saw (b) a slide (c) a well pulley (d) a crowbar
17. 17.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
18. 18.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
19. 19.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
20. 20.True or false: a bottle opener uses a pulley. (a) True (b) False
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
22. 22.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a slide (c) a flagpole (d) a well pulley
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) where the pencil is (c) the kind of coins (d) the same ruler
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
25. 25.True or false: a flat table is needed for the ruler lever. (a) True (b) False
26. 26.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
29. 29.True or false: a bottle opener is an inclined plane. (a) False (b) True
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
32. 32.True or false: a crowbar is a lever. (a) False (b) True
33. 33.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
35. 35.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
36. 36.True or false: yeast is needed for the ruler lever. (a) False (b) True
37. 37.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
38. 38.⚙️ Which of these uses a pulley? (a) a slide (b) a tap handle (c) a doorknob (d) a crane
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 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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