Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 259 · 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.True or false: a tap handle is a wheel and axle. (a) True (b) False
3. 3.⚖️ 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) False (b) True
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a magnet
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
8. 8.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a 30 cm ruler (d) a round pencil
9. 9.True or false: yeast is needed for the ruler lever. (a) True (b) False
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) coins of one kind (d) a balloon
11. 11.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
12. 12.⚖️ 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 kind of coins (c) where the pencil is (d) distance from the pencil
13. 13.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
15. 15.⚖️ 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?
16. 16.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
17. 17.⚖️ 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
18. 18.🧺 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 mirror (d) coins of one kind
19. 19.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) a round pencil (d) turmeric powder
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) turmeric powder
23. 23.⚖️ 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 change it (b) we measure it (c) we keep it the same
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a 30 cm ruler (c) coins of one kind (d) a round pencil
25. 25.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a crane (d) a crowbar
26. 26.⚖️ 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 1 cm to the right to balance it?
27. 27.True or false: a balloon is needed for the ruler lever. (a) True (b) False
28. 28.True or false: a well pulley uses a pulley. (a) False (b) True
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
30. 30.⚖️ 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
31. 31.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
32. 32.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) False (b) True
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
35. 35.⚖️ 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
36. 36.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
38. 38.True or false: a see-saw is a lever. (a) True (b) False
39. 39.True or false: a crane is an inclined plane. (a) True (b) False
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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