Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 331 · 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.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
2. 2.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
4. 4.🛟 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
5. 5.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
6. 6.⚙️ Which simple machine is a slide? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
7. 7.⚙️ Which of these is a lever? (a) a tap handle (b) a steering wheel (c) a doorknob (d) a spoon lifting a lid
8. 8.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a battery cell (d) turmeric powder
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) turmeric powder
10. 10.True or false: a flagpole uses a pulley. (a) False (b) True
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a balloon (c) a 30 cm ruler (d) coins of one kind
12. 12.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a mirror (c) a battery cell (d) a flat table
13. 13.True or false: a bottle opener uses a pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
15. 15.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
16. 16.True or false: a steering wheel is a wheel and axle. (a) False (b) True
17. 17.⚙️ Which of these uses a pulley? (a) a slide (b) a crowbar (c) a bottle opener (d) a flagpole
18. 18.⚖️ 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) the number of coins (c) the same ruler (d) the kind of coins
19. 19.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
20. 20.True or false: a crane is an inclined plane. (a) True (b) False
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
22. 22.⚖️ 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) where the pencil is (c) distance from the pencil
23. 23.⚙️ Which simple machine is a ramp? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
25. 25.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
26. 26.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
28. 28.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
29. 29.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) zero (d) always 10
30. 30.⚖️ 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 change it (b) we keep it the same (c) we measure it
31. 31.True or false: a flagpole is a lever. (a) False (b) True
32. 32.True or false: a steering wheel uses a pulley. (a) True (b) False
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) yeast
35. 35.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
37. 37.⚖️ 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 same ruler (b) distance from the pencil (c) which side goes down (d) the number of coins
38. 38.⚖️ 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
39. 39.⚖️ 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) True (b) False
40. 40.True or false: a spoon lifting a lid is a lever. (a) True (b) False

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