Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 122 · 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 well pulley? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) a balloon
3. 3.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 12 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
4. 4.True or false: a crane uses a pulley. (a) False (b) True
5. 5.True or false: a crowbar is a wheel and axle. (a) False (b) True
6. 6.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a 30 cm ruler (d) a mirror
8. 8.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
10. 10.⚖️ 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) True (b) False
11. 11.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a well pulley (c) a doorknob (d) a slide
12. 12.⚖️ 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
13. 13.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
14. 14.⚖️ 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 change it (c) we measure it
15. 15.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
16. 16.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a sloping road (d) a flagpole
17. 17.True or false: a doorknob uses a pulley. (a) True (b) False
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
19. 19.🧺 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 round pencil
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) which side goes down (b) distance from the pencil (c) the number of coins
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
23. 23.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a round pencil (c) a balloon (d) a battery cell
24. 24.True or false: a sloping road is a lever. (a) False (b) True
25. 25.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) coins of one kind (d) turmeric powder
28. 28.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
29. 29.🔮 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) both go up (d) neither, it balances
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
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 what we measure. (a) False (b) True
32. 32.True or false: a flagpole uses a pulley. (a) False (b) True
33. 33.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a flat table (d) a 30 cm ruler
34. 34.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a 30 cm ruler (d) a flat table
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 12 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 flat table (b) a round pencil (c) a 30 cm ruler (d) yeast
37. 37.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
38. 38.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
39. 39.True or false: a well pulley uses a pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever

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