Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 793 · 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.True or false: a balloon is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ 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
4. 4.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
5. 5.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a spoon lifting a lid (c) a crowbar (d) a doorknob
6. 6.🔮 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) the right side (c) neither, it balances (d) both go up
7. 7.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 5 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? Which of these is the one thing we change? (a) distance from the pencil (b) which side goes down (c) the kind of coins (d) where the pencil is
10. 10.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
12. 12.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
17. 17.True or false: a mirror is needed for the ruler lever. (a) True (b) False
18. 18.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
19. 19.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a see-saw (d) a doorknob
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) coins of one kind
21. 21.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a 30 cm ruler
23. 23.⚙️ Which simple machine is a well pulley? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
25. 25.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a see-saw (c) a steering wheel (d) a spoon lifting a lid
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a crowbar is a lever. (a) False (b) True
29. 29.True or false: a bottle opener is a wheel and axle. (a) True (b) False
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
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) the same ruler (b) where the pencil is (c) which side goes down (d) the kind of coins
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
33. 33.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
35. 35.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a magnet (d) yeast
36. 36.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
37. 37.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) a magnet (d) turmeric powder
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
39. 39.⚖️ 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) the same ruler
40. 40.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever

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