Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 473 · 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.True or false: a crane uses a pulley. (a) False (b) True
2. 2.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
3. 3.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) turmeric powder (d) yeast
4. 4.🧺 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) a round pencil
5. 5.⚙️ Which of these is an inclined plane? (a) a slide (b) a crowbar (c) a doorknob (d) a see-saw
6. 6.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
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) where the pencil is (b) distance from the pencil (c) the number of coins (d) which side goes down
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.True or false: a crowbar is a lever. (a) False (b) True
11. 11.⚖️ 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
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 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?
13. 13.True or false: a balloon is needed for the ruler lever. (a) False (b) True
14. 14.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the right side (c) neither, it balances (d) the left side
17. 17.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
18. 18.⚖️ 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 change it (c) we measure it
19. 19.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
20. 20.True or false: a see-saw is a wheel and axle. (a) False (b) True
21. 21.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
22. 22.🧺 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
23. 23.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
24. 24.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
25. 25.⚖️ 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?
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is what we measure. (a) False (b) True
27. 27.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a balloon
31. 31.🧺 Which of these is needed for the ruler lever? (a) yeast (b) coins of one kind (c) a mirror (d) a magnet
32. 32.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a well pulley
33. 33.⚖️ 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) which side goes down (b) the same ruler (c) where the pencil is (d) distance from the pencil
34. 34.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) stand on the ruler (d) flick coins at faces
35. 35.⚖️ 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?
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) a flat table
38. 38.⚖️ 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 2 cm to the right to balance it?
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) turmeric powder (c) a flat table (d) a 30 cm ruler
40. 40.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed

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