Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 619 · 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 the one thing we change? (a) the number of coins (b) the same ruler (c) distance from the pencil (d) the kind of coins
2. 2.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
3. 3.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
4. 4.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a battery cell
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
7. 7.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
8. 8.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are magnetic (c) they may swallow them (d) they are too shiny
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a magnet (c) coins of one kind (d) a flat table
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
14. 14.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
15. 15.⚙️ Which simple machine is a well pulley? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
18. 18.True or false: a round pencil 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? What do we do with “the number of coins”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
21. 21.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) a balloon (d) a flat table
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) a flat table
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) coins of one kind (d) a round pencil
25. 25.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
26. 26.⚖️ 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
27. 27.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
28. 28.True or false: a flat table is needed for the ruler lever. (a) True (b) False
29. 29.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) a battery cell
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
31. 31.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) turmeric powder (d) a battery cell
32. 32.True or false: a doorknob is a wheel and axle. (a) True (b) False
33. 33.⚙️ Which of these is a lever? (a) a crane (b) a doorknob (c) a spoon lifting a lid (d) a slide
34. 34.⚙️ Which of these is a lever? (a) a tap handle (b) a crane (c) a bottle opener (d) a sloping road
35. 35.True or false: yeast is needed for the ruler lever. (a) True (b) False
36. 36.True or false: yeast is not needed for the ruler lever. (a) True (b) False
37. 37.True or false: a well pulley uses a pulley. (a) True (b) False
38. 38.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
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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