Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 200 · 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 round pencil (c) yeast (d) a 30 cm ruler
2. 2.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a 30 cm ruler (d) a flat table
6. 6.⚖️ 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
7. 7.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
8. 8.⚙️ Which of these is an inclined plane? (a) a ramp (b) a doorknob (c) a crane (d) a bottle opener
9. 9.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
12. 12.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
13. 13.⚖️ 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
14. 14.🔮 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) both go up (d) the right side
15. 15.True or false: a bottle opener is a wheel and axle. (a) True (b) False
16. 16.🧺 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 balloon (d) a round pencil
17. 17.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
19. 19.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
20. 20.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a doorknob (c) a well pulley (d) a sloping road
21. 21.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
22. 22.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a see-saw (c) a sloping road (d) a tap handle
23. 23.⚖️ 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
24. 24.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
25. 25.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a crowbar (d) a tap handle
26. 26.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
29. 29.⚖️ 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 number of coins (b) the kind of coins (c) which side goes down (d) distance from the pencil
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
31. 31.🛟 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
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a flat table (d) coins of one kind
33. 33.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a balloon (d) a magnet
34. 34.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
35. 35.True or false: a slide is a lever. (a) False (b) True
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
38. 38.True or false: a balloon is needed for the ruler lever. (a) True (b) False
39. 39.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
40. 40.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer

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