Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 698 · 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.⚖️ 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) which side goes down (b) the kind of coins (c) distance from the pencil (d) the same ruler
2. 2.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
3. 3.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
4. 4.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a 30 cm ruler (d) a flat table
6. 6.🔮 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) the right side (c) both go up (d) the left side
7. 7.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a crowbar (d) a flagpole
8. 8.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
9. 9.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
10. 10.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
11. 11.🧺 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 flat table (d) a mirror
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
13. 13.True or false: yeast is needed for the ruler lever. (a) False (b) True
14. 14.⚖️ 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?
15. 15.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
17. 17.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) coins of one kind (d) a flat table
19. 19.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
22. 22.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a battery cell (d) coins of one kind
23. 23.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
27. 27.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) a 30 cm ruler (d) turmeric powder
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
30. 30.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a sloping road (c) a slide (d) a steering wheel
31. 31.⚖️ 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) where the pencil is (c) the number of coins (d) which side goes down
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 measure it (b) we change it (c) we keep it the same
33. 33.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
36. 36.⚖️ 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
37. 37.True or false: a doorknob is a wheel and axle. (a) False (b) True
38. 38.True or false: a tap handle is a wheel and axle. (a) False (b) True
39. 39.⚙️ Which of these uses a pulley? (a) a doorknob (b) a flagpole (c) a ramp (d) a sloping road
40. 40.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane

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