Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 37 · 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 is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a flat table (d) a magnet
2. 2.⚖️ 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
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) a 30 cm ruler
4. 4.True or false: a doorknob is an inclined plane. (a) True (b) False
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) a round pencil
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) yeast
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
8. 8.⚖️ 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 6 cm to the right to balance it?
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
10. 10.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
11. 11.True or false: a ramp is a lever. (a) True (b) False
12. 12.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
13. 13.⚖️ 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) distance from the pencil (d) the same ruler
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 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?
15. 15.True or false: a see-saw uses a pulley. (a) True (b) False
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.⚖️ 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
18. 18.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
20. 20.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
21. 21.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) neither, it balances (d) the right side
22. 22.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a sloping road (c) a flagpole (d) a crowbar
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 the one thing we change. (a) False (b) True
24. 24.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) yeast (d) a 30 cm ruler
26. 26.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a crowbar (c) a tap handle (d) a bottle opener
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
28. 28.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
29. 29.True or false: a crowbar uses a pulley. (a) True (b) False
30. 30.True or false: a spoon lifting a lid is a lever. (a) True (b) False
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) yeast (d) coins of one kind
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
33. 33.⚖️ 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 change it (c) we measure it
34. 34.True or false: a slide is an inclined plane. (a) False (b) True
35. 35.⚖️ 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) distance from the pencil (b) which side goes down (c) the number of coins (d) the kind of coins
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) which side goes down (c) distance from the pencil
37. 37.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a see-saw (c) a doorknob (d) a spoon lifting a lid
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a balloon
39. 39.True or false: a see-saw is a wheel and axle. (a) True (b) False
40. 40.⚖️ 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 change it (c) we keep it the same

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