Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 656 · 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.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ 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
3. 3.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
5. 5.True or false: yeast is not needed for the ruler lever. (a) True (b) False
6. 6.⚖️ 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
7. 7.🧺 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
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) a lever boosts your push (d) the spoon is magnetic
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a balloon (d) a round pencil
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) a round pencil
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
16. 16.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are magnetic (d) they are too shiny
17. 17.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
18. 18.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a crowbar (d) a see-saw
19. 19.⚖️ 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 kind of coins (b) distance from the pencil (c) the same ruler (d) the number of coins
20. 20.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
21. 21.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
22. 22.⚙️ Which simple machine is a slide? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
23. 23.⚖️ 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
24. 24.True or false: yeast is needed for the ruler lever. (a) False (b) True
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
27. 27.🛟 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
28. 28.True or false: a crane uses a pulley. (a) True (b) False
29. 29.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a battery cell (d) a flat table
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
32. 32.True or false: a flagpole uses a pulley. (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) which side goes down (b) where the pencil is (c) distance from the pencil
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a round pencil
35. 35.⚖️ 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 keep it the same (c) we measure it
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a round pencil
37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
38. 38.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
39. 39.⚖️ 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
40. 40.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum

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