Lever Experiment Worksheet

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

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