Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 897 · 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: a crane is a lever. (a) False (b) True
2. 2.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
3. 3.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
4. 4.🔮 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) both go up (c) the right side (d) the left side
5. 5.⚖️ 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
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
7. 7.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a magnet (d) a balloon
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
9. 9.⚙️ Which of these uses a pulley? (a) a sloping road (b) a bottle opener (c) a tap handle (d) a well pulley
10. 10.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
12. 12.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a crane (d) a flagpole
13. 13.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
14. 14.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a battery cell (d) yeast
15. 15.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) jump up and down (d) sit closer to middle
16. 16.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) a round pencil (d) coins of one kind
18. 18.True or false: a bottle opener is a lever. (a) True (b) False
19. 19.⚖️ 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 keep it the same (b) we measure it (c) we change it
20. 20.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
21. 21.⚖️ 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) the kind of coins (c) which side goes down
22. 22.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) yeast (c) a magnet (d) a balloon
23. 23.True or false: a balloon is needed for the ruler lever. (a) False (b) True
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
25. 25.⚖️ 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) distance from the pencil (c) where the pencil is
26. 26.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a round pencil
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
30. 30.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
31. 31.True or false: a crane uses a pulley. (a) False (b) True
32. 32.⚖️ 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 change it (c) we measure it
33. 33.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a battery cell (d) a flat table
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) coins of one kind
35. 35.True or false: yeast is not needed for the ruler lever. (a) False (b) True
36. 36.⚖️ 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 kind of coins (b) the same ruler (c) where the pencil is (d) distance from the pencil
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) turmeric powder (d) a 30 cm ruler
38. 38.⚖️ 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) where the pencil is (c) the same ruler (d) the number of coins
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 the one thing we change. (a) False (b) True
40. 40.⚖️ 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

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