Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 524 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
2. 2.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
3. 3.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
8. 8.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a battery cell (d) yeast
9. 9.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a flat table (d) a 30 cm ruler
12. 12.⚙️ Which of these is a lever? (a) a well pulley (b) a spoon lifting a lid (c) a flagpole (d) a doorknob
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
14. 14.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
16. 16.True or false: a ramp is a lever. (a) False (b) True
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
19. 19.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
20. 20.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
21. 21.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
22. 22.⚖️ 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 change it (b) we keep it the same (c) we measure it
23. 23.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
24. 24.True or false: a steering wheel is a lever. (a) False (b) True
25. 25.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
26. 26.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
27. 27.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
30. 30.⚖️ 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
31. 31.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a see-saw (c) a slide (d) a tap handle
32. 32.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a round pencil (d) a balloon
33. 33.True or false: a crowbar is a lever. (a) False (b) True
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a magnet (d) a round pencil
35. 35.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
36. 36.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
37. 37.True or false: a see-saw uses a pulley. (a) False (b) True
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
39. 39.🧺 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 30 cm ruler
40. 40.⚙️ Which simple machine is a bottle opener? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley

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