Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 575 · 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 simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
2. 2.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
3. 3.⚖️ 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
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a mirror (d) a 30 cm ruler
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
6. 6.True or false: a slide is an inclined plane. (a) False (b) True
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) a flat table
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) turmeric powder
9. 9.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
10. 10.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
12. 12.⚖️ 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
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
15. 15.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
16. 16.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
17. 17.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a 30 cm ruler (d) a battery cell
18. 18.True or false: a flagpole is a wheel and axle. (a) False (b) True
19. 19.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
20. 20.True or false: a sloping road is an inclined plane. (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: the same ruler is the one thing we change. (a) True (b) False
22. 22.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a flagpole (d) a doorknob
23. 23.⚖️ 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 8 cm to the right to balance it?
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
26. 26.⚙️ Which of these is an inclined plane? (a) a crane (b) a flagpole (c) a bottle opener (d) a sloping road
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
28. 28.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a battery cell (d) a balloon
29. 29.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
32. 32.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
33. 33.⚙️ Which simple machine is a see-saw? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
34. 34.True or false: a mirror is needed for the ruler lever. (a) True (b) False
35. 35.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
37. 37.🔮 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) both go up (c) the right side (d) neither, it balances
38. 38.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) coins of one kind (d) a flat table
40. 40.🧺 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 battery cell (d) coins of one kind

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