Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 987 · 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 needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) a flat table (d) a mirror
2. 2.True or false: a spoon lifting a lid uses a pulley. (a) False (b) True
3. 3.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are magnetic (d) they are too cold
4. 4.True or false: a magnet is needed for the ruler lever. (a) False (b) True
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a round pencil (d) a 30 cm ruler
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a battery cell (d) a round pencil
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
8. 8.True or false: a see-saw is a lever. (a) True (b) False
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
10. 10.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
11. 11.True or false: a bottle opener is an inclined plane. (a) True (b) False
12. 12.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
13. 13.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.⚖️ 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 same ruler (c) the number of coins (d) distance from the pencil
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
17. 17.⚖️ 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 number of coins (c) where the pencil is (d) which side goes down
18. 18.True or false: a ramp is a wheel and axle. (a) False (b) True
19. 19.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
20. 20.🧺 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) yeast
21. 21.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a flagpole (c) a spoon lifting a lid (d) a steering wheel
22. 22.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
23. 23.🔮 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) both go up (d) the right side
24. 24.⚖️ 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 measure it (b) we keep it the same (c) we change it
25. 25.⚙️ Which of these uses a pulley? (a) a ramp (b) a sloping road (c) a flagpole (d) a see-saw
26. 26.True or false: a slide is a wheel and axle. (a) True (b) False
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.⚖️ 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
30. 30.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
32. 32.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
33. 33.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
35. 35.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
36. 36.True or false: a ramp is a lever. (a) False (b) True
37. 37.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 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?
40. 40.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a round pencil (d) a 30 cm ruler

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