Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 938 · 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.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
3. 3.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a round pencil (d) turmeric powder
4. 4.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
6. 6.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a magnet (d) a 30 cm ruler
8. 8.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
9. 9.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
10. 10.True or false: a flagpole is a lever. (a) True (b) False
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) where the pencil is (c) the kind of coins (d) distance from the pencil
13. 13.⚖️ 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
14. 14.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
15. 15.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) always 10 (d) bigger on the left
16. 16.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a balloon (d) a 30 cm ruler
17. 17.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
18. 18.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a well pulley (c) a steering wheel (d) a sloping road
19. 19.🧺 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 round pencil
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 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?
21. 21.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
22. 22.True or false: a crowbar is a lever. (a) False (b) True
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a battery cell (d) a 30 cm ruler
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 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?
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a mirror (d) a 30 cm ruler
27. 27.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a round pencil
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
30. 30.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a flagpole (c) a tap handle (d) a bottle opener
31. 31.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is magnetic (d) the spoon is hot
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
35. 35.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
36. 36.🔮 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
37. 37.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) a flat table
39. 39.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?

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