Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 457 · 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 simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
2. 2.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
3. 3.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) turmeric powder (d) a balloon
5. 5.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
8. 8.⚙️ Which simple machine is a crane? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
9. 9.True or false: a magnet is needed for the ruler lever. (a) True (b) False
10. 10.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a round pencil (c) a balloon (d) a magnet
11. 11.True or false: a balloon is needed for the ruler lever. (a) True (b) False
12. 12.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
13. 13.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a ramp (d) a slide
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) coins of one kind (d) a flat table
15. 15.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
18. 18.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
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) the same ruler (b) distance from the pencil (c) the number of coins (d) which side goes down
20. 20.⚖️ 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 kind of coins (b) which side goes down (c) distance from the pencil
21. 21.⚖️ 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
22. 22.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
24. 24.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) yeast (c) a mirror (d) a 30 cm ruler
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 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?
30. 30.⚙️ Which of these is a lever? (a) a crane (b) a ramp (c) a flagpole (d) a see-saw
31. 31.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False
33. 33.🧺 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 battery cell (d) a 30 cm ruler
34. 34.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
37. 37.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
38. 38.⚖️ 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
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 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: the kind of coins is kept the same. (a) True (b) False

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