Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 108 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a flat table
2. 2.⚖️ 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) which side goes down (b) where the pencil is (c) the number of coins (d) distance from the pencil
3. 3.True or false: a magnet is needed for the ruler lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) coins of one kind
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
6. 6.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a bottle opener (c) a crowbar (d) a doorknob
7. 7.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny
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: distance from the pencil is the one thing we change. (a) False (b) True
10. 10.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a crowbar (c) a tap handle (d) a flagpole
11. 11.True or false: a see-saw is a wheel and axle. (a) True (b) False
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 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?
15. 15.True or false: a flagpole uses a pulley. (a) False (b) True
16. 16.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
17. 17.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) the right side (d) neither, it balances
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
20. 20.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
23. 23.True or false: a flat table is needed for the ruler lever. (a) False (b) True
24. 24.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a magnet (d) a 30 cm ruler
26. 26.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
27. 27.⚙️ Which simple machine is a bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) the same (d) easier
30. 30.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a battery cell (c) yeast (d) turmeric powder
31. 31.🧺 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) a magnet
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 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?
33. 33.⚖️ 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) True (b) False
34. 34.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) coins of one kind
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.🛟 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
38. 38.True or false: yeast is needed for the ruler lever. (a) False (b) True
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 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?
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind

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