Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 446 · 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.True or false: yeast is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
3. 3.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
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.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) True (b) False
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.🧺 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 magnet (d) coins of one kind
9. 9.⚖️ 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) the number of coins (b) distance from the pencil (c) where the pencil is (d) the kind of coins
10. 10.True or false: a tap handle is a wheel and axle. (a) False (b) True
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) yeast
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) turmeric powder (d) a round pencil
14. 14.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
15. 15.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
16. 16.True or false: coins of one kind 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 round pencil (c) a 30 cm ruler (d) a balloon
18. 18.True or false: a crane uses a pulley. (a) False (b) True
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
21. 21.⚙️ Which of these is an inclined plane? (a) a slide (b) a well pulley (c) a bottle opener (d) a spoon lifting a lid
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) yeast (c) a round pencil (d) coins of one kind
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) turmeric powder (d) coins of one kind
24. 24.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a sloping road (c) a flagpole (d) a bottle opener
25. 25.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a well pulley (d) a tap handle
26. 26.⚖️ 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
27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) turmeric powder (c) a round pencil (d) yeast
28. 28.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crane (c) a well pulley (d) a doorknob
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
30. 30.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a magnet (d) a mirror
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) a round pencil
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (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 what we measure? (a) distance from the pencil (b) where the pencil is (c) which side goes down (d) the kind of coins
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.⚖️ 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
37. 37.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
38. 38.True or false: yeast is needed for the ruler lever. (a) True (b) False
39. 39.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
40. 40.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a bottle opener (d) a see-saw

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