Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 82 · 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.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they are too cold (d) they may swallow them
2. 2.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ 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) distance from the pencil (c) which side goes down (d) the kind of coins
4. 4.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
6. 6.🧺 Do we need a battery cell 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 “distance from the pencil”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
10. 10.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a slide (d) a spoon lifting a lid
11. 11.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) a round pencil (d) a flat table
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 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?
15. 15.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
16. 16.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) a flat table (d) a 30 cm ruler
18. 18.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
19. 19.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a round pencil (d) yeast
20. 20.True or false: a flat table is needed for the ruler lever. (a) False (b) True
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) yeast (c) coins of one kind (d) a 30 cm ruler
22. 22.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 5 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?
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
26. 26.⚖️ 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
27. 27.True or false: a see-saw is a lever. (a) False (b) True
28. 28.⚖️ 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) which side goes down (c) the kind of coins
29. 29.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a steering wheel (c) a crane (d) a ramp
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a battery cell
31. 31.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
32. 32.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
34. 34.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
35. 35.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
36. 36.⚙️ Which of these is a lever? (a) a well pulley (b) a crane (c) a ramp (d) a see-saw
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these is a lever? (a) a well pulley (b) a ramp (c) a sloping road (d) a bottle opener
39. 39.⚙️ Which of these is a wheel and axle? (a) a see-saw (b) a doorknob (c) a spoon lifting a lid (d) a bottle opener
40. 40.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False

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