Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 882 · 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.⚖️ 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
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a 30 cm ruler (d) turmeric powder
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a magnet
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.True or false: yeast is needed for the ruler lever. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a mirror (d) coins of one kind
10. 10.True or false: a flagpole is a lever. (a) True (b) False
11. 11.🔮 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) both go up (c) the left side (d) the right side
12. 12.⚙️ Which simple machine is a slide? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
13. 13.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a mirror (d) a magnet
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
15. 15.True or false: a tap handle 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) the same (b) harder (c) impossible (d) easier
17. 17.True or false: a balloon is needed for the ruler lever. (a) True (b) False
18. 18.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
20. 20.⚖️ 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
21. 21.⚙️ Which of these is a lever? (a) a flagpole (b) a crowbar (c) a steering wheel (d) a ramp
22. 22.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 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?
24. 24.⚖️ 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) distance from the pencil (d) where the pencil is
25. 25.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
26. 26.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
27. 27.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
28. 28.True or false: a tap handle is a wheel and axle. (a) False (b) True
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.⚖️ 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 measure it (b) we keep it the same (c) we change it
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a battery cell
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a flat table
34. 34.⚙️ Which simple machine is a crane? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) coins of one kind
36. 36.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a see-saw (c) a sloping road (d) a doorknob
37. 37.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 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?
39. 39.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
40. 40.⚖️ 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?

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