Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 168 · 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.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a 30 cm ruler (d) coins of one kind
3. 3.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
5. 5.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
6. 6.⚙️ Which of these uses a pulley? (a) a sloping road (b) a well pulley (c) a crowbar (d) a ramp
7. 7.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) turmeric powder (c) a flat table (d) a round pencil
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a round pencil
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
13. 13.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a sloping road (c) a tap handle (d) a crane
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) coins of one kind (d) a round pencil
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 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?
16. 16.⚖️ 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
17. 17.🧺 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 battery cell
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) False (b) True
19. 19.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
20. 20.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) coins of one kind (d) a balloon
21. 21.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) a battery cell (d) yeast
22. 22.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
23. 23.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
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) the same ruler (b) distance from the pencil (c) where the pencil is (d) the number of coins
25. 25.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
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) a mirror
28. 28.⚖️ 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) distance from the pencil (c) the number of coins (d) which side goes down
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
31. 31.True or false: a bottle opener is a lever. (a) True (b) False
32. 32.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
34. 34.True or false: yeast is needed for the ruler lever. (a) False (b) True
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 10 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) where the pencil is
37. 37.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a well pulley (d) a see-saw
39. 39.⚖️ 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
40. 40.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley

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