Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 268 · 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 bottle opener? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
2. 2.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) coins of one kind
3. 3.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
5. 5.True or false: a bottle opener is a wheel and axle. (a) True (b) False
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) bend it till it snaps (d) press it gently
7. 7.⚖️ 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 number of coins (c) the kind of coins (d) where the pencil is
8. 8.⚖️ 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
9. 9.🔮 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
10. 10.⚖️ 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) where the pencil is (c) which side goes down
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) yeast (c) a round pencil (d) a mirror
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) a round pencil
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
15. 15.⚖️ 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) which side goes down (c) the number of coins
16. 16.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
18. 18.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a balloon (c) a mirror (d) a magnet
19. 19.True or false: a flat table is needed for the ruler lever. (a) True (b) False
20. 20.True or false: a see-saw uses a pulley. (a) True (b) False
21. 21.True or false: a well pulley uses a pulley. (a) False (b) True
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) yeast (d) a flat table
23. 23.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a balloon
25. 25.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a steering wheel (c) a tap handle (d) a ramp
26. 26.⚖️ 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) distance from the pencil (c) which side goes down (d) the same ruler
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
29. 29.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
30. 30.True or false: yeast is not needed for the ruler lever. (a) False (b) True
31. 31.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a flagpole (c) a doorknob (d) a sloping road
32. 32.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
33. 33.⚖️ 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
34. 34.⚙️ Which of these is an inclined plane? (a) a crane (b) a doorknob (c) a crowbar (d) a sloping road
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a flat table
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) a battery cell
37. 37.⚖️ 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 change it (c) we measure it
38. 38.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
39. 39.True or false: a sloping road is an inclined plane. (a) False (b) True
40. 40.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same

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