Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 946 · 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
2. 2.⚖️ 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) the number of coins (c) where the pencil is (d) distance from the pencil
3. 3.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
4. 4.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
5. 5.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
7. 7.⚙️ Which of these is a lever? (a) a sloping road (b) a crane (c) a steering wheel (d) a bottle opener
8. 8.⚖️ 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
9. 9.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
10. 10.True or false: a ramp is a wheel and axle. (a) False (b) True
11. 11.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
12. 12.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) a flat table
15. 15.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
16. 16.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) jump up and down (c) sit farther from middle (d) sit on the middle
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a battery cell
21. 21.🔮 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) the right side (c) neither, it balances (d) both go up
22. 22.⚙️ Which simple machine is a crowbar? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
23. 23.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ 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
25. 25.True or false: a magnet is needed for the ruler lever. (a) True (b) False
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a round pencil
27. 27.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) a magnet (d) a battery cell
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) False (b) True
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) coins of one kind
30. 30.⚖️ 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) False (b) True
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the number of coins (c) which side goes down
34. 34.True or false: a crane uses a pulley. (a) True (b) False
35. 35.⚙️ Which of these is a lever? (a) a steering wheel (b) a flagpole (c) a spoon lifting a lid (d) a tap handle
36. 36.True or false: a see-saw is an inclined plane. (a) False (b) True
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a sloping road is a wheel and axle. (a) False (b) True
39. 39.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) the kind of coins (c) which side goes down (d) where the pencil is

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