Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 485 · 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? True or false: which side goes down is the one thing we change. (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: the same ruler is kept the same. (a) False (b) True
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
4. 4.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
5. 5.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
6. 6.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the number of coins (c) which side goes down (d) distance from the pencil
8. 8.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a magnet
9. 9.⚖️ 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
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a battery cell (d) coins of one kind
13. 13.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a doorknob (d) a sloping road
14. 14.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) a magnet
16. 16.True or false: a spoon lifting a lid is a lever. (a) False (b) True
17. 17.True or false: a bottle opener uses a pulley. (a) True (b) False
18. 18.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
19. 19.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
20. 20.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a crowbar (d) a slide
21. 21.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they are too cold (d) they may swallow them
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a mirror (d) a round pencil
24. 24.True or false: a mirror is needed for the ruler lever. (a) False (b) True
25. 25.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
26. 26.⚖️ 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 measure it (b) we keep it the same (c) we change it
27. 27.True or false: a bottle opener is a lever. (a) True (b) False
28. 28.True or false: a flagpole is an inclined plane. (a) False (b) True
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) a round pencil (d) coins of one kind
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
31. 31.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
32. 32.True or false: a flagpole uses a pulley. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
34. 34.⚖️ 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) True (b) False
35. 35.⚙️ Which of these is a lever? (a) a doorknob (b) a see-saw (c) a slide (d) a steering wheel
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
38. 38.⚖️ 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?
39. 39.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
40. 40.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the left side (c) neither, it balances (d) the right side

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