Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 609 · 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 “where the pencil is”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.🔮 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) the right side (c) the left side (d) both go up
3. 3.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
4. 4.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
5. 5.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a round pencil (d) a flat table
7. 7.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
8. 8.⚖️ 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 kind of coins (c) distance from the pencil
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
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) where the pencil is (b) which side goes down (c) the kind of coins (d) distance from the pencil
13. 13.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
14. 14.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
15. 15.⚖️ 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
16. 16.⚙️ Which of these is an inclined plane? (a) a ramp (b) a spoon lifting a lid (c) a flagpole (d) a well pulley
17. 17.True or false: a tap handle is a wheel and axle. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a flat table (d) yeast
19. 19.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
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) the same ruler (b) which side goes down (c) distance from the pencil
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
22. 22.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
23. 23.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
24. 24.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
25. 25.True or false: a well pulley uses a pulley. (a) True (b) False
26. 26.True or false: a steering wheel is a wheel and axle. (a) False (b) True
27. 27.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
28. 28.🧺 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
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) yeast (d) a 30 cm ruler
31. 31.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
32. 32.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a battery cell (d) a 30 cm ruler
33. 33.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
34. 34.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a crowbar (c) a see-saw (d) a crane
35. 35.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
36. 36.True or false: a crowbar uses a pulley. (a) False (b) True
37. 37.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a crowbar (c) a slide (d) a bottle opener
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a balloon (c) a flat table (d) a 30 cm ruler
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) yeast (d) turmeric powder

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