Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 931 · 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.🔮 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
2. 2.True or false: a balloon is needed for the ruler lever. (a) False (b) True
3. 3.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) coins of one kind
5. 5.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a balloon (d) a flat table
6. 6.🛟 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
7. 7.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a tap handle (d) a see-saw
8. 8.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
9. 9.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) yeast (c) a 30 cm ruler (d) a flat table
10. 10.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
11. 11.True or false: a bottle opener is an inclined plane. (a) True (b) False
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) impossible (d) easier
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a battery cell
14. 14.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a magnet (d) a battery cell
15. 15.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crowbar (c) a crane (d) a sloping road
16. 16.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
17. 17.True or false: a crowbar is a wheel and axle. (a) True (b) False
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a balloon (d) a flat table
20. 20.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
22. 22.⚖️ 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) the number of coins (c) distance from the pencil (d) which side goes down
23. 23.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a round pencil
25. 25.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) a magnet
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a magnet (d) coins of one kind
28. 28.⚖️ 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?
29. 29.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
30. 30.⚖️ 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
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
33. 33.True or false: a flat table is needed for the ruler lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) coins of one kind (c) a round pencil (d) a flat table
35. 35.True or false: a crane is an inclined plane. (a) True (b) False
36. 36.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
39. 39.⚖️ 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 keep it the same (c) we change it
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?

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