Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 103 · 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? True or false: the number of coins is the one thing we change. (a) True (b) False
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a flat table (d) a 30 cm ruler
3. 3.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a doorknob (d) a see-saw
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
5. 5.⚙️ Which of these is a wheel and axle? (a) a crane (b) a tap handle (c) a slide (d) a crowbar
6. 6.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) yeast (d) a battery cell
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a balloon
10. 10.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
11. 11.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a well pulley (c) a doorknob (d) a bottle opener
12. 12.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a steering wheel (d) a crane
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) which side goes down (c) the kind of coins (d) the same ruler
14. 14.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) a flat table
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
17. 17.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
18. 18.⚖️ 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 same ruler (c) where the pencil is (d) distance from the pencil
19. 19.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
20. 20.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
21. 21.🧺 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 flat table (d) yeast
22. 22.⚖️ 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 keep it the same (b) we measure it (c) we change it
23. 23.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
24. 24.🔮 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 left side (b) both go up (c) the right side (d) neither, it balances
25. 25.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) yeast
28. 28.⚙️ Which of these is a lever? (a) a slide (b) a steering wheel (c) a spoon lifting a lid (d) a crane
29. 29.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) jump up and down (d) sit farther from middle
30. 30.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
31. 31.⚖️ 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 change it (c) we measure it
32. 32.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
34. 34.True or false: a crowbar is a lever. (a) False (b) True
35. 35.⚖️ 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 keep it the same (b) we change it (c) we measure it
36. 36.True or false: a ramp is a wheel and axle. (a) False (b) True
37. 37.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
38. 38.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
39. 39.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
40. 40.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a balloon (d) a mirror

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