Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 203 · 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 “which side goes down”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.⚖️ 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 measure it (c) we change it
3. 3.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
4. 4.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
5. 5.🛟 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
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
7. 7.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a see-saw (c) a slide (d) a bottle opener
8. 8.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) a round pencil
10. 10.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
11. 11.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a mirror (d) a 30 cm ruler
12. 12.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a magnet (d) a mirror
13. 13.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) the same (d) impossible
18. 18.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) coins of one kind (d) a round pencil
20. 20.True or false: yeast is needed for the ruler lever. (a) True (b) False
21. 21.🧺 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
22. 22.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
24. 24.⚖️ 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) distance from the pencil (b) the kind of coins (c) which side goes down (d) where the pencil is
25. 25.🔮 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) neither, it balances (c) the left side (d) the right side
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a magnet
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ 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) the kind of coins (c) which side goes down (d) distance from the pencil
31. 31.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a 30 cm ruler (d) a flat table
33. 33.⚖️ 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 keep it the same (c) we measure it
34. 34.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a flat table (d) a round pencil
36. 36.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
37. 37.True or false: a crowbar is an inclined plane. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a mirror
40. 40.⚖️ 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?

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