Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 466 · 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.⚙️ Which of these uses a pulley? (a) a ramp (b) a see-saw (c) a flagpole (d) a crowbar
2. 2.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
3. 3.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
5. 5.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) equal on both sides (d) always 10
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a 30 cm ruler (d) a flat table
7. 7.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) coins of one kind (d) a 30 cm ruler
9. 9.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
10. 10.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a battery cell
11. 11.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a balloon (c) a 30 cm ruler (d) a battery cell
12. 12.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
14. 14.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a crowbar (c) a doorknob (d) a spoon lifting a lid
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “which side goes down”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
17. 17.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
19. 19.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
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) which side goes down (b) the number of coins (c) distance from the pencil
21. 21.⚙️ Which of these is a lever? (a) a steering wheel (b) a sloping road (c) a doorknob (d) a bottle opener
22. 22.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a sloping road (d) a slide
23. 23.True or false: a see-saw is a wheel and axle. (a) False (b) True
24. 24.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
25. 25.🔮 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
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
27. 27.True or false: a doorknob is an inclined plane. (a) False (b) True
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) yeast
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
30. 30.⚖️ 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
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
32. 32.⚖️ 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
33. 33.True or false: a crowbar is a lever. (a) False (b) True
34. 34.True or false: a flagpole uses a pulley. (a) False (b) True
35. 35.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a sloping road (d) a tap handle
36. 36.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
37. 37.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
38. 38.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer
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 change it (b) we measure it (c) we keep it the same
40. 40.True or false: yeast is needed for the ruler lever. (a) True (b) False

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