Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 499 · 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.🛟 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
2. 2.🧺 Do we need a round pencil 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 “which side goes down”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
5. 5.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) a magnet
7. 7.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a balloon (d) yeast
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a mirror (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
10. 10.⚖️ 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 same ruler (c) distance from the pencil (d) which side goes down
11. 11.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
12. 12.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
13. 13.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
14. 14.True or false: a balloon is needed for the ruler lever. (a) True (b) False
15. 15.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
16. 16.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
17. 17.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
18. 18.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
19. 19.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
20. 20.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
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) neither, it balances (b) the right side (c) both go up (d) the left side
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) coins of one kind (d) a 30 cm ruler
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
24. 24.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
25. 25.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) a round pencil (d) a flat table
26. 26.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
27. 27.⚖️ 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 kind of coins
28. 28.⚖️ 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
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 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.⚖️ What is the turning point of a lever called? (a) the effort (b) the axle (c) the fulcrum (d) the load
32. 32.⚖️ 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
33. 33.True or false: a flagpole uses a pulley. (a) False (b) True
34. 34.⚙️ Which of these is a lever? (a) a slide (b) a doorknob (c) a steering wheel (d) a crowbar
35. 35.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
36. 36.🛟 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
37. 37.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these uses a pulley? (a) a crowbar (b) a see-saw (c) a flagpole (d) a ramp
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a flat table (d) a 30 cm ruler
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?

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