Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 968 · 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.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a balloon
2. 2.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a flagpole (c) a bottle opener (d) a slide
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) yeast
4. 4.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) the number of coins (c) where the pencil is (d) distance from the pencil
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
7. 7.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit farther from middle (d) sit on the middle
8. 8.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) turmeric powder
10. 10.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
11. 11.⚙️ Which of these uses a pulley? (a) a crowbar (b) a doorknob (c) a crane (d) a tap handle
12. 12.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
13. 13.⚙️ Which simple machine is a crane? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
14. 14.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
15. 15.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) yeast
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
18. 18.⚖️ 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 measure it (c) we change it
19. 19.⚙️ Which of these is a lever? (a) a flagpole (b) a ramp (c) a crane (d) a spoon lifting a lid
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a magnet (d) a round pencil
21. 21.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
22. 22.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a well pulley (d) a crowbar
23. 23.🧺 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 magnet (d) a flat table
24. 24.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) turmeric powder (d) a 30 cm ruler
26. 26.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) harder (d) impossible
27. 27.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a well pulley (c) a bottle opener (d) a sloping road
28. 28.True or false: a well pulley uses a pulley. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
30. 30.True or false: a see-saw is a lever. (a) True (b) False
31. 31.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
32. 32.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a mirror
36. 36.⚖️ 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) where the pencil is (d) the number of coins
37. 37.True or false: a mirror is needed for the ruler lever. (a) False (b) True
38. 38.🔮 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
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we measure it (c) we keep it the same
40. 40.True or false: yeast is not needed for the ruler lever. (a) False (b) True

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