Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 635 · 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.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a balloon (d) a round pencil
2. 2.⚖️ 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 kind of coins (c) where the pencil is (d) distance from the pencil
3. 3.🔮 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) the left side (d) both go up
4. 4.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) coins of one kind (d) a flat table
7. 7.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
8. 8.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
10. 10.True or false: a flagpole is a wheel and axle. (a) True (b) False
11. 11.True or false: a steering wheel is an inclined plane. (a) False (b) True
12. 12.⚖️ 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
13. 13.🧺 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 mirror (d) coins of one kind
14. 14.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
15. 15.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) jump up and down (c) sit closer to middle (d) sit farther from middle
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) True (b) False
17. 17.True or false: a slide is an inclined plane. (a) True (b) False
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ 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
21. 21.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
25. 25.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
26. 26.True or false: a crowbar is a lever. (a) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a doorknob (b) a crane (c) a see-saw (d) a slide
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
29. 29.True or false: a flagpole is a lever. (a) True (b) False
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.True or false: a doorknob is a wheel and axle. (a) True (b) False
32. 32.True or false: a tap handle is a lever. (a) False (b) True
33. 33.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
34. 34.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a 30 cm ruler (d) turmeric powder
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the number of coins (c) the kind of coins (d) which side goes down
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a balloon (d) a 30 cm ruler
40. 40.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a flagpole (c) a ramp (d) a crowbar

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