Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 843 · 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.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a flat table (c) a magnet (d) turmeric powder
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) coins of one kind
3. 3.⚙️ Which of these is a wheel and axle? (a) a slide (b) a bottle opener (c) a sloping road (d) a doorknob
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a magnet (d) a 30 cm ruler
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
7. 7.True or false: a see-saw is a lever. (a) False (b) True
8. 8.True or false: yeast is not needed for the ruler lever. (a) False (b) True
9. 9.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
10. 10.⚖️ 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
11. 11.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
12. 12.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) the left side (b) both go up (c) neither, it balances (d) the right side
13. 13.⚖️ 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
14. 14.🧺 Which of these is not needed for the ruler lever? (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 “where the pencil is”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.⚙️ Which of these is an inclined plane? (a) a flagpole (b) a crowbar (c) a bottle opener (d) a slide
17. 17.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
19. 19.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) coins of one kind (d) a balloon
20. 20.True or false: a ramp is an inclined plane. (a) False (b) True
21. 21.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
22. 22.⚖️ 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) distance from the pencil (c) the number of coins (d) which side goes down
23. 23.⚖️ 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 kind of coins (c) the number of coins (d) distance from the pencil
24. 24.⚖️ 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 change it (c) we keep it the same
25. 25.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a doorknob (d) a crane
26. 26.⚖️ 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) False (b) True
27. 27.⚙️ Which of these is a lever? (a) a crane (b) a sloping road (c) a see-saw (d) a steering wheel
28. 28.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
30. 30.🧺 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) a magnet
31. 31.True or false: a crane uses a pulley. (a) False (b) True
32. 32.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) turmeric powder (d) a 30 cm ruler
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.🧺 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 battery cell (d) a flat table
37. 37.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
39. 39.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
40. 40.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a sloping road (d) a ramp

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