Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 173 · 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.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.⚖️ 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?
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 6 cm to the right to balance it?
5. 5.⚖️ 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
6. 6.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) a mirror (d) a magnet
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a flat table
8. 8.🧺 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) a flat table (d) a magnet
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🔮 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) the right side (d) both go up
11. 11.⚙️ Which of these uses a pulley? (a) a crowbar (b) a ramp (c) a steering wheel (d) a well pulley
12. 12.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
14. 14.⚖️ 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
15. 15.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a steering wheel (c) a flagpole (d) a see-saw
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) a round pencil (d) a 30 cm ruler
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) harder (d) the same
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 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?
22. 22.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
23. 23.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
25. 25.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a crowbar (d) a ramp
26. 26.True or false: a mirror is needed for the ruler lever. (a) False (b) True
27. 27.True or false: a tap handle uses a pulley. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
30. 30.True or false: a slide is an inclined plane. (a) False (b) True
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the same ruler (c) which side goes down (d) distance from the pencil
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
33. 33.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
34. 34.True or false: a steering wheel is an inclined plane. (a) False (b) True
35. 35.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
37. 37.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a crane (d) a well pulley
38. 38.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.⚙️ Which of these uses a pulley? (a) a crane (b) a steering wheel (c) a doorknob (d) a sloping road

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