Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 63 · 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: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
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 kept the same. (a) False (b) True
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
4. 4.True or false: a magnet is needed for the ruler lever. (a) True (b) False
5. 5.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a see-saw (d) a sloping road
6. 6.True or false: a bottle opener is a lever. (a) True (b) False
7. 7.⚖️ 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
8. 8.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) yeast (d) a 30 cm ruler
13. 13.⚖️ 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
14. 14.True or false: a see-saw is a wheel and axle. (a) True (b) False
15. 15.True or false: a slide is an inclined plane. (a) True (b) False
16. 16.True or false: a steering wheel is a wheel and axle. (a) False (b) True
17. 17.⚖️ 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 number of coins (b) the same ruler (c) which side goes down (d) distance from the pencil
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
19. 19.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) yeast
22. 22.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a flat table (d) yeast
23. 23.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
24. 24.🛟 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
25. 25.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
27. 27.True or false: a doorknob is a lever. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
29. 29.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the axle (d) the load
30. 30.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
31. 31.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a ramp (d) a crowbar
32. 32.⚖️ 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 spoon is hot (d) the lid gets softer
33. 33.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a mirror (d) yeast
34. 34.True or false: a tap handle is a lever. (a) False (b) True
35. 35.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
38. 38.🔮 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
39. 39.True or false: a flagpole uses a pulley. (a) True (b) False
40. 40.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a mirror (d) a battery cell

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