Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 542 · 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.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
3. 3.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) yeast (d) a round pencil
4. 4.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a mirror (d) a balloon
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
6. 6.⚙️ Which of these is a lever? (a) a doorknob (b) a slide (c) a well pulley (d) a bottle opener
7. 7.⚖️ 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) the number of coins (c) the kind of coins (d) distance from the pencil
8. 8.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) turmeric powder (d) coins of one kind
10. 10.⚖️ 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 keep it the same (b) we change it (c) we measure it
11. 11.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a flat table (d) a round pencil
12. 12.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a tap handle (d) a see-saw
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
15. 15.⚙️ Which of these is an inclined plane? (a) a slide (b) a tap handle (c) a bottle opener (d) a doorknob
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 kept the same. (a) False (b) True
17. 17.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a balloon (d) a magnet
18. 18.⚙️ Which of these uses a pulley? (a) a tap handle (b) a steering wheel (c) a crane (d) a bottle opener
19. 19.⚙️ Which simple machine is a crane? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
20. 20.⚖️ 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 measure it (c) we change it
21. 21.True or false: yeast is needed for the ruler lever. (a) True (b) False
22. 22.⚖️ 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) the number of coins
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a flat table (d) coins of one kind
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a balloon
27. 27.True or false: a flat table is needed for the ruler lever. (a) True (b) False
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
30. 30.True or false: a ramp is a lever. (a) True (b) False
31. 31.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a battery cell (d) coins of one kind
32. 32.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
33. 33.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
34. 34.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) a round pencil
36. 36.⚖️ 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
37. 37.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
38. 38.⚖️ 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) the spoon is magnetic (d) a lever boosts your push
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
40. 40.True or false: a see-saw is a wheel and axle. (a) True (b) False

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