Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 896 · 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 same ruler is kept the same. (a) False (b) True
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
3. 3.⚖️ 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) False (b) True
4. 4.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
5. 5.🔮 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 right side (b) neither, it balances (c) the left side (d) both go up
6. 6.⚙️ Which simple machine is a sloping road? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
7. 7.⚖️ 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
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) turmeric powder (d) a 30 cm ruler
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
13. 13.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
14. 14.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
15. 15.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 1 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
17. 17.🛟 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
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
19. 19.⚖️ 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 change it (c) we measure it
20. 20.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) coins of one kind (d) a round pencil
22. 22.⚖️ 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) distance from the pencil (d) which side goes down
23. 23.⚖️ 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 kind of coins (b) where the pencil is (c) the same ruler (d) which side goes down
24. 24.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind
26. 26.True or false: a well pulley uses a pulley. (a) True (b) False
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) a balloon
28. 28.True or false: yeast is needed for the ruler lever. (a) False (b) True
29. 29.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
31. 31.⚖️ 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) distance from the pencil (c) the same ruler
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) coins of one kind (d) a 30 cm ruler
33. 33.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a spoon lifting a lid (c) a sloping road (d) a doorknob
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
35. 35.True or false: a mirror is needed for the ruler lever. (a) True (b) False
36. 36.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) a balloon (d) a round pencil
37. 37.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
38. 38.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
39. 39.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
40. 40.🧺 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 balloon

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