Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 810 · 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 a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) press it gently (d) stand on the ruler
2. 2.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
5. 5.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
7. 7.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a magnet (d) a flat table
8. 8.🔮 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
9. 9.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
10. 10.⚙️ Which of these uses a pulley? (a) a sloping road (b) a crane (c) a steering wheel (d) a crowbar
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a battery cell (c) a flat table (d) coins of one kind
12. 12.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) yeast (d) a flat table
14. 14.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 12 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
16. 16.⚖️ 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) distance from the pencil (c) the same ruler (d) which side goes down
17. 17.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
18. 18.True or false: a balloon is needed for the ruler lever. (a) False (b) True
19. 19.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
20. 20.⚖️ 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
21. 21.⚙️ Which of these is a lever? (a) a flagpole (b) a bottle opener (c) a tap handle (d) a slide
22. 22.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a round pencil (d) a flat table
24. 24.⚙️ Which simple machine is a see-saw? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) harder (d) the same
26. 26.True or false: yeast is not needed for the ruler lever. (a) True (b) False
27. 27.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a see-saw (c) a slide (d) a steering wheel
28. 28.⚖️ 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
29. 29.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
30. 30.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
31. 31.⚖️ 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
32. 32.⚙️ Which of these uses a pulley? (a) a flagpole (b) a spoon lifting a lid (c) a steering wheel (d) a sloping road
33. 33.⚖️ 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) True (b) False
34. 34.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
35. 35.True or false: a crane uses a pulley. (a) True (b) False
36. 36.🧺 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 round pencil (d) a magnet
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a sloping road is an inclined plane. (a) False (b) True
39. 39.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) False (b) True
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a balloon (c) a round pencil (d) a 30 cm ruler

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids