Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 922 · 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? True or false: the same ruler is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) turmeric powder
8. 8.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
9. 9.🛟 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
10. 10.True or false: a see-saw is a wheel and axle. (a) True (b) False
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a mirror (d) a flat table
12. 12.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
13. 13.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
14. 14.True or false: a well pulley is a wheel and axle. (a) False (b) True
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) coins of one kind
16. 16.🔮 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
17. 17.⚙️ Which of these is a lever? (a) a flagpole (b) a steering wheel (c) a see-saw (d) a crane
18. 18.⚙️ Which of these is a lever? (a) a ramp (b) a spoon lifting a lid (c) a well pulley (d) a flagpole
19. 19.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a 30 cm ruler (c) a magnet (d) a mirror
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a balloon
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit closer to middle (d) sit farther from middle
22. 22.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
25. 25.⚖️ 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
26. 26.True or false: yeast is not needed for the ruler lever. (a) False (b) True
27. 27.True or false: a well pulley is a lever. (a) False (b) True
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) coins of one kind
29. 29.⚖️ 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 8 cm to the right to balance it?
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
31. 31.True or false: a well pulley is an inclined plane. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
35. 35.⚖️ 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 number of coins (b) the kind of coins (c) the same ruler (d) distance from the pencil
36. 36.True or false: a well pulley uses a pulley. (a) False (b) True
37. 37.True or false: a flat table is needed for the ruler lever. (a) False (b) True
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 10 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a 30 cm ruler (d) a round pencil
40. 40.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a flat table

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