Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 865 · 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.⚖️ 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 keep it the same (c) we change it
2. 2.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.⚖️ 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?
5. 5.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a doorknob (c) a flagpole (d) a ramp
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 8 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
8. 8.⚙️ Which of these is a lever? (a) a well pulley (b) a crowbar (c) a slide (d) a crane
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
10. 10.🧺 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 balloon
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
12. 12.True or false: a crowbar is a lever. (a) False (b) True
13. 13.🔮 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 right side (d) the left side
14. 14.⚙️ Which of these uses a pulley? (a) a doorknob (b) a crowbar (c) a flagpole (d) a tap handle
15. 15.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a tap handle is a wheel and axle. (a) False (b) True
17. 17.True or false: a balloon is needed for the ruler lever. (a) False (b) True
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
19. 19.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a sloping road (c) a slide (d) a steering wheel
20. 20.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a 30 cm ruler (d) turmeric powder
21. 21.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a well pulley (d) a bottle opener
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
23. 23.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ 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
26. 26.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) which side goes down (b) distance from the pencil (c) the kind of coins (d) the number of coins
29. 29.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a flat table (d) a round pencil
31. 31.True or false: a see-saw is a lever. (a) False (b) True
32. 32.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a round pencil (d) a mirror
33. 33.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a doorknob (c) a crowbar (d) a slide
35. 35.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
36. 36.⚖️ 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 6 cm to the right to balance it?
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
38. 38.True or false: a steering wheel is a wheel and axle. (a) False (b) True
39. 39.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
40. 40.⚖️ 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) distance from the pencil (c) the same ruler

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