Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 784 · 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 “where the pencil is”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.⚖️ 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) where the pencil is (b) the same ruler (c) distance from the pencil (d) which side goes down
3. 3.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) a flat table
5. 5.⚖️ 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
6. 6.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a battery cell (d) coins of one kind
9. 9.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
12. 12.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
13. 13.⚖️ 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
14. 14.⚖️ 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) False (b) True
15. 15.⚖️ 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
16. 16.⚖️ 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
17. 17.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a slide (c) a flagpole (d) a tap handle
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) a mirror
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
20. 20.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
21. 21.⚖️ 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?
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
23. 23.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
24. 24.True or false: a steering wheel is a wheel and axle. (a) True (b) False
25. 25.⚖️ 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
26. 26.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
27. 27.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
28. 28.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
29. 29.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
31. 31.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) turmeric powder (d) a flat table
33. 33.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
34. 34.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.⚖️ 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 measure it (b) we keep it the same (c) we change it
36. 36.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) a mirror (d) a magnet
37. 37.True or false: a magnet is needed for the ruler lever. (a) False (b) True
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a balloon
40. 40.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a flat table (c) a round pencil (d) coins of one kind

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