Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 994 · 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.🔮 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) both go up (c) the left side (d) the right side
2. 2.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
3. 3.🛟 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
4. 4.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
5. 5.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) coins of one kind (d) a round pencil
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) always 10 (d) zero
9. 9.⚙️ Which of these is a lever? (a) a see-saw (b) a slide (c) a sloping road (d) a doorknob
10. 10.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
12. 12.⚖️ 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) distance from the pencil (d) which side goes down
13. 13.True or false: a slide is an inclined plane. (a) False (b) True
14. 14.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a round pencil (d) coins of one kind
15. 15.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
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.⚙️ Which of these is a lever? (a) a steering wheel (b) a doorknob (c) a ramp (d) a spoon lifting a lid
18. 18.True or false: a doorknob is an inclined plane. (a) True (b) False
19. 19.True or false: yeast is needed for the ruler lever. (a) True (b) False
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) a mirror
21. 21.🛟 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
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
24. 24.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a mirror (d) a battery cell
25. 25.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a ramp (d) a see-saw
28. 28.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
30. 30.True or false: a magnet is needed for the ruler lever. (a) True (b) False
31. 31.⚖️ 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 measure it (b) we change it (c) we keep it the same
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a flat table (d) coins of one kind
33. 33.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
34. 34.True or false: a 30 cm ruler is needed for the ruler 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: where the pencil is is kept the same. (a) True (b) False
36. 36.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) turmeric powder
37. 37.⚖️ 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
38. 38.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) a lever boosts your push (d) the lid gets softer
39. 39.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the axle (c) the effort (d) the load
40. 40.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False

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