Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 244 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a flat table (d) a 30 cm ruler
2. 2.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
4. 4.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
5. 5.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a mirror (d) turmeric powder
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 4 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) False (b) True
9. 9.True or false: a sloping road is an inclined plane. (a) False (b) True
10. 10.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
11. 11.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
12. 12.⚖️ 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 number of coins (b) distance from the pencil (c) which side goes down
13. 13.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a balloon
15. 15.⚖️ 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
16. 16.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
18. 18.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
19. 19.⚖️ 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 same ruler (c) the kind of coins (d) distance from the pencil
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.⚖️ 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
22. 22.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
23. 23.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a see-saw (c) a slide (d) a steering wheel
24. 24.⚙️ Which of these is a lever? (a) a ramp (b) a steering wheel (c) a flagpole (d) a crowbar
25. 25.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
26. 26.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
27. 27.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a mirror (d) a battery cell
29. 29.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ 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) True (b) False
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) a flat table (d) coins of one kind
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the lid gets softer (d) the spoon is hot
33. 33.⚙️ Which simple machine is a sloping road? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
34. 34.🛟 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
35. 35.⚖️ 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) distance from the pencil (c) where the pencil is (d) which side goes down
36. 36.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
38. 38.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
39. 39.True or false: a flat table is needed for the ruler lever. (a) True (b) False
40. 40.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed

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