Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 467 · 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) the left side (b) neither, it balances (c) the right side (d) both go up
2. 2.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
3. 3.⚖️ 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 same ruler (b) which side goes down (c) where the pencil is (d) distance from the pencil
4. 4.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a flagpole (d) a tap handle
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
6. 6.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
7. 7.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they are too shiny (d) they may swallow them
8. 8.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) coins of one kind (d) a 30 cm ruler
10. 10.⚙️ Which of these is a lever? (a) a crane (b) a crowbar (c) a doorknob (d) a well pulley
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a magnet (d) a 30 cm ruler
13. 13.⚙️ Which of these is an inclined plane? (a) a crane (b) a sloping road (c) a bottle opener (d) a crowbar
14. 14.⚖️ 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) the number of coins (c) which side goes down
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
16. 16.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) turmeric powder (d) a balloon
17. 17.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) turmeric powder (d) a mirror
18. 18.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
19. 19.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a flat table (d) a 30 cm ruler
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) yeast (d) a round pencil
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
23. 23.True or false: a ramp is a wheel and axle. (a) False (b) True
24. 24.⚖️ 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
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.True or false: a mirror is needed for the ruler lever. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ 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
29. 29.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) a magnet (d) a mirror
30. 30.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
31. 31.⚖️ 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) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a sloping road is an inclined plane. (a) True (b) False
34. 34.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
35. 35.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a ramp (d) a tap handle
36. 36.True or false: a steering wheel is a lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
38. 38.⚙️ Which of these uses a pulley? (a) a ramp (b) a flagpole (c) a bottle opener (d) a see-saw
39. 39.⚖️ 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) which side goes down (c) distance from the pencil (d) the number of coins
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a round pencil (d) coins of one kind

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