Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 87 · 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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
2. 2.True or false: a crowbar is a wheel and axle. (a) True (b) False
3. 3.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
4. 4.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a 30 cm ruler (d) a magnet
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the kind of coins (c) which side goes down (d) the number of coins
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a mirror (c) a round pencil (d) a 30 cm ruler
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) a 30 cm ruler (d) coins of one kind
11. 11.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a bottle opener (c) a see-saw (d) a well pulley
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True
13. 13.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
14. 14.⚖️ 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 5 cm to the right to balance it?
15. 15.True or false: a slide is an inclined plane. (a) True (b) False
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
17. 17.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a round pencil (d) turmeric powder
18. 18.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the right side (d) the left side
19. 19.⚖️ 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 measure it (c) we change it
20. 20.⚖️ 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) the number of coins (c) distance from the pencil
21. 21.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a round pencil (d) coins of one kind
23. 23.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit closer to middle (c) sit farther from middle (d) jump up and down
25. 25.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
26. 26.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
28. 28.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a see-saw (d) a well pulley
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a flat table
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
34. 34.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) coins of one kind (d) yeast
35. 35.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
36. 36.True or false: a magnet is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ 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?
38. 38.⚖️ 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?
39. 39.True or false: a spoon lifting a lid is a lever. (a) True (b) False
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a balloon (d) a round pencil

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