Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 628 · 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? What do we do with “distance from the pencil”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
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 number of coins (b) which side goes down (c) distance from the pencil
4. 4.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
6. 6.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a flat table (d) yeast
8. 8.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a round pencil
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
10. 10.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
11. 11.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a see-saw (c) a sloping road (d) a spoon lifting a lid
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a flat table (d) a 30 cm ruler
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 kept the same. (a) False (b) True
14. 14.⚙️ Which simple machine is a doorknob? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
15. 15.⚖️ 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) distance from the pencil (d) which side goes down
16. 16.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
17. 17.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
18. 18.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) press it gently (d) stand on the ruler
19. 19.⚖️ 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) True (b) False
20. 20.⚖️ 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) which side goes down (c) where the pencil is (d) the same ruler
21. 21.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
22. 22.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
23. 23.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we measure it (b) we keep it the same (c) we change 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 kept the same. (a) False (b) True
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
26. 26.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
27. 27.⚙️ Which of these uses a pulley? (a) a crane (b) a doorknob (c) a crowbar (d) a ramp
28. 28.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.⚖️ 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) False (b) True
32. 32.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
33. 33.🧺 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 magnet (d) a 30 cm ruler
34. 34.⚖️ 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) True (b) False
35. 35.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
36. 36.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.⚖️ 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 keep it the same (c) we change it
39. 39.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a sloping road (d) a see-saw
40. 40.True or false: a see-saw is a lever. (a) True (b) False

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