Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 462 · 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.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a battery cell (d) coins of one kind
2. 2.🛟 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
3. 3.True or false: a see-saw is an inclined plane. (a) True (b) False
4. 4.⚖️ 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 change it (c) we keep it the same
5. 5.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
6. 6.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) coins of one kind (d) a round pencil
8. 8.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a ramp (c) a crane (d) a crowbar
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) a round pencil
10. 10.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
13. 13.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
14. 14.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a flat table (d) a mirror
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
18. 18.⚖️ 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 keep it the same (b) we change it (c) we measure it
19. 19.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
20. 20.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
21. 21.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a tap handle (d) a bottle opener
22. 22.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a flat table (d) a 30 cm ruler
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit farther from middle (d) sit closer to middle
24. 24.True or false: a flagpole is a lever. (a) True (b) False
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
26. 26.⚖️ 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 same ruler
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
28. 28.True or false: a slide is a lever. (a) True (b) False
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.⚖️ 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 kind of coins
31. 31.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a round pencil (d) a battery cell
32. 32.⚖️ 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 change it (b) we keep it the same (c) we measure it
33. 33.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
34. 34.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 12 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
37. 37.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
39. 39.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
40. 40.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane

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