Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 260 · 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? Which of these is kept the same? (a) which side goes down (b) the number of coins (c) distance from the pencil
2. 2.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a crane (c) a see-saw (d) a slide
3. 3.⚖️ 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 kind of coins (b) which side goes down (c) distance from the pencil
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a flat table (d) coins of one kind
5. 5.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
6. 6.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) turmeric powder (c) a battery cell (d) coins of one kind
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
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 balloon (d) a round pencil
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
10. 10.⚖️ 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 measure it (c) we change it
11. 11.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a mirror
13. 13.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
14. 14.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a tap handle (c) a ramp (d) a well pulley
15. 15.🧺 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) turmeric powder
16. 16.True or false: a steering wheel is a wheel and axle. (a) False (b) True
17. 17.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
18. 18.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) yeast (d) a flat table
19. 19.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
20. 20.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
22. 22.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is magnetic (d) the spoon is hot
23. 23.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
24. 24.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
25. 25.🛟 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
26. 26.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
27. 27.⚖️ 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) which side goes down (c) distance from the pencil
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
30. 30.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a sloping road (c) a doorknob (d) a well pulley
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
33. 33.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a round pencil
34. 34.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
35. 35.True or false: a slide is an inclined plane. (a) False (b) True
36. 36.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) yeast (d) a balloon
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
38. 38.🔮 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 right side (b) neither, it balances (c) both go up (d) the left side
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a battery cell
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a 30 cm ruler (d) a round pencil

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