Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 855 · 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.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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?
3. 3.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
4. 4.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
5. 5.⚖️ 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
6. 6.🔮 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 left side (c) the right side (d) both go up
7. 7.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.True or false: a ramp is an inclined plane. (a) False (b) True
10. 10.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a spoon lifting a lid (d) a slide
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 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?
12. 12.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
13. 13.⚖️ 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) the kind of coins
14. 14.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
17. 17.⚖️ 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
18. 18.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a round pencil (d) a balloon
19. 19.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) yeast (d) a flat table
20. 20.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
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) the number of coins (b) distance from the pencil (c) where the pencil is (d) the same ruler
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a round pencil (d) a 30 cm ruler
23. 23.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) harder (d) impossible
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) turmeric powder
25. 25.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a sloping road (c) a see-saw (d) a bottle opener
26. 26.⚖️ 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
27. 27.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crane (c) a bottle opener (d) a slide
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
29. 29.⚖️ 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
30. 30.🧺 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 mirror (d) a round pencil
31. 31.True or false: a bottle opener is a lever. (a) True (b) False
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) coins of one kind (d) a 30 cm ruler
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) which side goes down (d) where the pencil is
34. 34.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
35. 35.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
36. 36.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
38. 38.True or false: a sloping road is a wheel and axle. (a) False (b) True
39. 39.⚖️ 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 keep it the same (b) we measure it (c) we change it
40. 40.⚖️ 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) False (b) True

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