Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 120 · 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 flagpole? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
2. 2.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
3. 3.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
4. 4.⚖️ 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
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) which side goes down (d) the kind of coins
7. 7.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a flat table (c) a 30 cm ruler (d) a round pencil
8. 8.🔮 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) neither, it balances (c) the right side (d) both go up
9. 9.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
10. 10.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a battery cell (d) a magnet
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a battery cell
14. 14.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
15. 15.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
16. 16.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) yeast (d) a flat table
17. 17.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
18. 18.True or false: a steering wheel is a wheel and axle. (a) False (b) True
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
20. 20.True or false: a flat table is needed for the ruler lever. (a) True (b) False
21. 21.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a see-saw (c) a steering wheel (d) a sloping road
22. 22.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
23. 23.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
24. 24.⚖️ 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) False (b) True
25. 25.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a tap handle (c) a crowbar (d) a crane
26. 26.⚖️ 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) True (b) False
27. 27.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) coins of one kind (d) a 30 cm ruler
29. 29.True or false: a doorknob is a wheel and axle. (a) True (b) False
30. 30.True or false: a slide is a wheel and axle. (a) False (b) True
31. 31.True or false: yeast is not needed for the ruler lever. (a) False (b) True
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) coins of one kind
34. 34.⚖️ 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
35. 35.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ 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) distance from the pencil (c) which side goes down (d) the kind of coins
37. 37.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.⚖️ 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) distance from the pencil (c) the kind of coins
39. 39.⚖️ 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 change it (b) we keep it the same (c) we measure it
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?

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