Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 917 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a battery cell (d) a flat table
2. 2.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
3. 3.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a steering wheel (c) a spoon lifting a lid (d) a sloping road
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
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) neither, it balances (b) the left side (c) the right side (d) both go up
7. 7.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) turmeric powder
8. 8.⚖️ 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
9. 9.🛟 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
10. 10.True or false: a doorknob is a wheel and axle. (a) True (b) False
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
12. 12.⚙️ Which of these uses a pulley? (a) a well pulley (b) a bottle opener (c) a tap handle (d) a steering wheel
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
14. 14.⚖️ 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
15. 15.⚖️ 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) True (b) False
16. 16.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
18. 18.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
19. 19.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
20. 20.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
21. 21.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
22. 22.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a mirror (c) yeast (d) a magnet
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) distance from the pencil (c) which side goes down
24. 24.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
25. 25.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
27. 27.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
28. 28.⚙️ Which of these is a lever? (a) a doorknob (b) a crowbar (c) a sloping road (d) a steering wheel
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
30. 30.🧺 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 mirror (d) a 30 cm ruler
31. 31.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
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.⚖️ 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
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a 30 cm ruler (d) a flat table
36. 36.⚖️ 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) the number of coins (b) the same ruler (c) the kind of coins (d) distance from the pencil
37. 37.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a flat table
39. 39.⚖️ 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?
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 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?

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