Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 374 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
2. 2.⚙️ Which of these is a lever? (a) a ramp (b) a tap handle (c) a spoon lifting a lid (d) a well pulley
3. 3.⚙️ Which of these is a lever? (a) a tap handle (b) a ramp (c) a bottle opener (d) a steering wheel
4. 4.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
5. 5.⚖️ 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) where the pencil is (c) distance from the pencil (d) which side goes down
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a round pencil (d) yeast
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) coins of one kind (d) a flat table
10. 10.🔮 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 right side (b) the left side (c) both go up (d) neither, it balances
11. 11.⚖️ 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
12. 12.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) the spoon is magnetic (c) the spoon is hot (d) a lever boosts your push
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) the number of coins (c) distance from the pencil (d) which side goes down
14. 14.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
15. 15.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
16. 16.⚖️ 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 measure it (c) we change it
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 3 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
18. 18.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
19. 19.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
20. 20.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) bigger on the left (d) zero
21. 21.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too cold (d) they are too shiny
22. 22.⚖️ 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
23. 23.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
24. 24.⚙️ Which simple machine is a flagpole? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
25. 25.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
26. 26.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a flat table (c) a 30 cm ruler (d) a round pencil
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) a round pencil (d) turmeric powder
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 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?
30. 30.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a flagpole (c) a spoon lifting a lid (d) a tap handle
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
32. 32.True or false: a see-saw is a lever. (a) False (b) True
33. 33.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) yeast (c) a round pencil (d) coins of one kind
35. 35.⚖️ 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
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
38. 38.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
39. 39.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a steering wheel (c) a flagpole (d) a sloping road
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?

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