Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 993 · 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 of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a balloon (d) yeast
2. 2.⚖️ 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
3. 3.⚙️ Which of these uses a pulley? (a) a crane (b) a doorknob (c) a bottle opener (d) a steering wheel
4. 4.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
6. 6.True or false: a flat table is needed for the ruler lever. (a) False (b) True
7. 7.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
8. 8.⚖️ 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 number of coins (b) distance from the pencil (c) where the pencil is (d) which side goes down
9. 9.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) turmeric powder (d) a flat table
10. 10.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
11. 11.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) jump up and down (d) sit on the middle
15. 15.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
17. 17.⚖️ 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
18. 18.🛟 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
19. 19.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
21. 21.⚖️ 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) distance from the pencil (b) where the pencil is (c) which side goes down (d) the same ruler
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
25. 25.⚖️ 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) False (b) True
26. 26.True or false: a ramp is a wheel and axle. (a) False (b) True
27. 27.⚖️ 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
28. 28.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
31. 31.🔮 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) the left side (d) both go up
32. 32.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
33. 33.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a spoon lifting a lid (d) a tap handle
34. 34.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
36. 36.⚖️ 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
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) a flat table (d) a 30 cm ruler
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a magnet (d) a flat table
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) a mirror

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