Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 296 · 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? What do we do with “the number of coins”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) True (b) False
3. 3.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
4. 4.🧺 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) a battery cell
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
7. 7.⚖️ 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?
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) which side goes down (c) where the pencil is (d) the kind of coins
12. 12.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a steering wheel (d) a see-saw
13. 13.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) a battery cell
14. 14.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
15. 15.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a balloon is needed for the ruler lever. (a) False (b) True
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a 30 cm ruler
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a flat table (d) a balloon
19. 19.⚖️ 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 same ruler (c) the number of coins (d) which side goes down
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
21. 21.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a balloon (c) coins of one kind (d) a magnet
22. 22.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
23. 23.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a well pulley (d) a doorknob
24. 24.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a battery cell (d) a mirror
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
27. 27.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a balloon (c) a 30 cm ruler (d) yeast
29. 29.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
30. 30.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a spoon lifting a lid (c) a bottle opener (d) a tap handle
31. 31.⚖️ 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) True (b) False
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) a 30 cm ruler (d) coins of one kind
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the number of coins (c) which side goes down
34. 34.True or false: yeast is not needed for the ruler lever. (a) False (b) True
35. 35.True or false: a bottle opener is a lever. (a) True (b) False
36. 36.⚖️ 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?
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a round pencil (d) coins of one kind
40. 40.True or false: a tap handle uses a pulley. (a) True (b) False

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