Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 391 · 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? Which of these is what we measure? (a) the number of coins (b) which side goes down (c) distance from the pencil (d) where the pencil is
2. 2.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
3. 3.True or false: a bottle opener uses a pulley. (a) True (b) False
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
6. 6.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
9. 9.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
10. 10.⚖️ 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) True (b) False
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
13. 13.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) a 30 cm ruler
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror
16. 16.⚖️ 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) which side goes down (b) the number of coins (c) distance from the pencil (d) where the pencil is
17. 17.True or false: a flat table is needed for the ruler lever. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a mirror (c) a magnet (d) coins of one kind
19. 19.True or false: a sloping road is a wheel and axle. (a) False (b) True
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) a flat table (d) a round pencil
21. 21.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) turmeric powder
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) yeast (c) a balloon (d) a magnet
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is hot (c) the spoon is magnetic (d) a lever boosts your push
26. 26.🧺 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 flat table
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a flat table (d) a magnet
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a mirror
30. 30.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
31. 31.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a ramp (c) a spoon lifting a lid (d) a crowbar
32. 32.True or false: yeast is not needed for the ruler lever. (a) False (b) True
33. 33.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) bigger on the left (d) always 10
34. 34.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
35. 35.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
36. 36.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
37. 37.True or false: a magnet is needed for the ruler lever. (a) False (b) True
38. 38.⚖️ 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
39. 39.True or false: a bottle opener is an inclined plane. (a) True (b) False
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) True (b) False

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