Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 732 · 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 uses a pulley? (a) a crane (b) a sloping road (c) a bottle opener (d) a ramp
2. 2.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a mirror (d) a flat table
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 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?
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a 30 cm ruler
6. 6.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
7. 7.🔮 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 right side (c) the left side (d) neither, it balances
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) coins of one kind
11. 11.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
12. 12.⚖️ 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 keep it the same (b) we change it (c) we measure it
13. 13.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a mirror (d) a 30 cm ruler
15. 15.True or false: a ramp is a lever. (a) False (b) True
16. 16.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
17. 17.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the number of coins
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.True or false: yeast is not needed for the ruler lever. (a) True (b) False
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a magnet (d) a 30 cm ruler
23. 23.True or false: a see-saw is a lever. (a) True (b) False
24. 24.True or false: a spoon lifting a lid is a lever. (a) False (b) True
25. 25.⚖️ 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?
26. 26.⚙️ Which simple machine is a well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
27. 27.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.⚙️ Which of these uses a pulley? (a) a doorknob (b) a flagpole (c) a sloping road (d) a crowbar
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) a balloon
32. 32.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
33. 33.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
34. 34.True or false: a flat table is needed for the ruler lever. (a) False (b) True
35. 35.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a steering wheel (c) a slide (d) a well pulley
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a mirror (d) a 30 cm ruler
37. 37.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) a mirror
38. 38.🧺 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 round pencil (d) turmeric powder
39. 39.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) a flat table (d) coins of one kind

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