Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 863 · 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 “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
3. 3.True or false: a well pulley uses a pulley. (a) False (b) True
4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a crane (c) a doorknob (d) a bottle opener
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 measure it (c) we keep it the same
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
7. 7.True or false: a flat table is needed for the ruler lever. (a) False (b) True
8. 8.⚖️ 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
9. 9.True or false: a crowbar is a lever. (a) False (b) True
10. 10.🧺 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 mirror
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) yeast
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a balloon
14. 14.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
15. 15.⚖️ 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?
16. 16.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
17. 17.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
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 what we measure. (a) True (b) False
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) flick coins at faces (d) bend it till it snaps
20. 20.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
21. 21.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) coins of one kind
22. 22.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
23. 23.⚙️ Which of these uses a pulley? (a) a doorknob (b) a slide (c) a flagpole (d) a steering wheel
24. 24.⚖️ 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 same ruler (b) where the pencil is (c) the number of coins (d) distance from the pencil
25. 25.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
26. 26.⚖️ 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 lid gets softer (d) the spoon is hot
27. 27.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
28. 28.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
29. 29.True or false: a sloping road is a lever. (a) True (b) False
30. 30.🔮 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) both go up (d) the right side
31. 31.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
32. 32.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
33. 33.⚖️ 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
34. 34.True or false: a doorknob is a lever. (a) False (b) True
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
36. 36.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) True (b) False
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a round pencil (d) a flat table
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a round pencil (c) a 30 cm ruler (d) a flat table
40. 40.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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