Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 894 · 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 tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a round pencil (d) a 30 cm ruler
5. 5.🧺 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 mirror (d) a 30 cm ruler
6. 6.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) bigger on the left (d) always 10
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a magnet (d) a balloon
9. 9.⚖️ 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 farther from middle (d) sit closer to middle
10. 10.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
11. 11.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
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: a steering wheel is an inclined plane. (a) True (b) False
14. 14.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a magnet (d) a mirror
15. 15.⚖️ 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 change it (c) we keep it the same
16. 16.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
17. 17.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
18. 18.True or false: a well pulley uses a pulley. (a) False (b) True
19. 19.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
20. 20.True or false: a steering wheel is a lever. (a) True (b) False
21. 21.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ 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
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
25. 25.True or false: a crowbar is a lever. (a) True (b) False
26. 26.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
27. 27.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
28. 28.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a mirror (c) a balloon (d) a 30 cm ruler
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) a round pencil
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a round pencil
31. 31.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
32. 32.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
33. 33.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
34. 34.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
35. 35.⚖️ 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) True (b) False
36. 36.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a well pulley (c) a spoon lifting a lid (d) a sloping road
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
39. 39.⚖️ 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 keep it the same (c) we measure it
40. 40.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a bottle opener (c) a sloping road (d) a slide

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