Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 30 · 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? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
4. 4.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
5. 5.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
7. 7.⚖️ 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) the same ruler (c) distance from the pencil
8. 8.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
9. 9.⚙️ Which of these uses a pulley? (a) a tap handle (b) a flagpole (c) a slide (d) a see-saw
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
11. 11.True or false: a crowbar uses a pulley. (a) True (b) False
12. 12.⚖️ 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 measure it (b) we change it (c) we keep it the same
13. 13.⚖️ 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) where the pencil is (c) distance from the pencil (d) the same ruler
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
15. 15.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
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 needed for the ruler lever? (a) turmeric powder (b) yeast (c) a 30 cm ruler (d) a mirror
18. 18.⚖️ 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 measure it (c) we change it
19. 19.🧺 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) turmeric powder
20. 20.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) a round pencil
22. 22.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a battery cell (d) a round pencil
23. 23.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
24. 24.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a well pulley (d) a see-saw
25. 25.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a flat table (d) a round pencil
26. 26.⚖️ 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
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a mirror
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
29. 29.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) coins of one kind (d) a magnet
30. 30.🧺 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 round pencil (d) a magnet
31. 31.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a magnet
34. 34.True or false: a flat table is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a flat table (d) a round pencil
36. 36.True or false: a flagpole uses a pulley. (a) True (b) False
37. 37.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a steering wheel (c) a ramp (d) a bottle opener
40. 40.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a sloping road (c) a ramp (d) a flagpole

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