Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 85 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
3. 3.⚖️ 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) where the pencil is (c) distance from the pencil
4. 4.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
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 change it (b) we keep it the same (c) we measure it
6. 6.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a magnet (d) a 30 cm ruler
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
9. 9.⚖️ 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) False (b) True
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a round pencil
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
13. 13.🧺 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) yeast (d) a flat table
14. 14.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
15. 15.True or false: a well pulley is an inclined plane. (a) False (b) True
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
17. 17.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
18. 18.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a mirror (d) yeast
19. 19.True or false: a see-saw is a lever. (a) False (b) True
20. 20.True or false: a bottle opener is an inclined plane. (a) False (b) True
21. 21.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a well pulley (c) a flagpole (d) a steering wheel
22. 22.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
23. 23.🔮 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 right side (b) the left side (c) both go up (d) neither, it balances
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a flat table (d) turmeric powder
25. 25.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
26. 26.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
27. 27.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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?
29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
30. 30.⚖️ 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 same ruler (b) which side goes down (c) the number of coins (d) the kind of coins
31. 31.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) coins of one kind (d) a 30 cm ruler
33. 33.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a flagpole (c) a ramp (d) a steering wheel
34. 34.⚖️ 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) the same ruler (c) the kind of coins (d) the number of coins
35. 35.⚖️ 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 measure it (b) we keep it the same (c) we change it
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) which side goes down (c) distance from the pencil
37. 37.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a spoon lifting a lid (c) a slide (d) a steering wheel
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) coins of one kind (d) a flat table
39. 39.⚖️ 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
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 2 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?

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