Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 991 · 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 not needed for the ruler lever? (a) coins of one kind (b) a mirror (c) a round pencil (d) a flat table
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) turmeric powder
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
4. 4.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
5. 5.True or false: a mirror is needed for the ruler lever. (a) False (b) True
6. 6.⚖️ 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
7. 7.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
8. 8.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a tap handle (d) a crowbar
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
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 the one thing we change. (a) False (b) True
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a balloon (d) coins of one kind
16. 16.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) bigger on the left (c) always 10 (d) equal on both sides
17. 17.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the lid gets softer (d) the spoon is magnetic
18. 18.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
19. 19.True or false: a see-saw is a lever. (a) True (b) False
20. 20.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
21. 21.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a bottle opener (d) a sloping road
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
24. 24.⚖️ 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
25. 25.True or false: a flagpole is a lever. (a) False (b) True
26. 26.True or false: a 30 cm ruler is not 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? Which of these is the one thing we change? (a) where the pencil is (b) the same ruler (c) the number of coins (d) distance from the pencil
28. 28.🔮 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 right side (d) the left side
29. 29.True or false: a ramp is a wheel and axle. (a) True (b) False
30. 30.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) turmeric powder (d) a magnet
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
33. 33.⚙️ Which of these uses a pulley? (a) a bottle opener (b) a crane (c) a see-saw (d) a slide
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a 30 cm ruler (d) a flat table
35. 35.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
36. 36.True or false: a flat table is needed for the ruler lever. (a) False (b) True
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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