Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 237 · 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: 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) both go up (c) neither, it balances (d) the right side
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
3. 3.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the kind of coins
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a balloon (d) a round pencil
6. 6.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a battery cell (d) a mirror
7. 7.⚖️ 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) True (b) False
8. 8.True or false: a bottle opener is an inclined plane. (a) False (b) True
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
10. 10.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
11. 11.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
12. 12.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
14. 14.True or false: a bottle opener is a lever. (a) False (b) True
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
17. 17.⚖️ 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 same ruler (b) which side goes down (c) the number of coins (d) distance from the pencil
18. 18.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
19. 19.⚙️ Which of these is a lever? (a) a steering wheel (b) a bottle opener (c) a doorknob (d) a ramp
20. 20.⚖️ 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
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a magnet (d) yeast
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a round pencil (d) coins of one kind
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a flagpole (d) a doorknob
26. 26.⚖️ 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
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
28. 28.True or false: a sloping road is an inclined plane. (a) True (b) False
29. 29.True or false: a magnet is needed for the ruler lever. (a) True (b) False
30. 30.True or false: a crowbar is an inclined plane. (a) True (b) False
31. 31.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a ramp (c) a see-saw (d) a crane
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
33. 33.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) turmeric powder (d) a round pencil
35. 35.⚖️ 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 measure it (c) we keep it the same
36. 36.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
38. 38.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down (d) the number of coins
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
40. 40.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True

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