Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 338 · 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) neither, it balances (c) both go up (d) the right side
2. 2.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
5. 5.True or false: yeast is needed for the ruler lever. (a) False (b) True
6. 6.⚙️ Which simple machine is a flagpole? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
7. 7.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
8. 8.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
9. 9.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a round pencil (d) turmeric powder
10. 10.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are too shiny (d) they are magnetic
11. 11.🧺 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) a flat table (d) a magnet
12. 12.True or false: a spoon lifting a lid is a lever. (a) True (b) False
13. 13.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
14. 14.True or false: a bottle opener is a lever. (a) True (b) False
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
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) False (b) True
22. 22.True or false: a crane uses a pulley. (a) False (b) True
23. 23.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a mirror (d) a 30 cm ruler
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) a magnet (d) a mirror
25. 25.⚖️ 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 same ruler (c) distance from the pencil (d) the number of coins
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a flat table
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
29. 29.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a spoon lifting a lid (d) a crane
30. 30.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a round pencil (d) a magnet
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a balloon
32. 32.⚙️ Which of these is a lever? (a) a bottle opener (b) a ramp (c) a flagpole (d) a sloping road
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) where the pencil is
34. 34.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
35. 35.True or false: yeast is not needed for the ruler lever. (a) True (b) False
36. 36.True or false: a flagpole is a wheel and axle. (a) True (b) False
37. 37.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
38. 38.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
39. 39.True or false: a slide is an inclined plane. (a) False (b) True
40. 40.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down

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