Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 59 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) harder (c) impossible (d) the same
2. 2.True or false: yeast is needed for the ruler lever. (a) False (b) True
3. 3.🛟 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
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 5 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
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 right side (b) neither, it balances (c) both go up (d) the left side
9. 9.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
10. 10.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
11. 11.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a flat table (c) coins of one kind (d) a round pencil
12. 12.True or false: a crane is a wheel and axle. (a) True (b) False
13. 13.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is hot (c) the spoon is magnetic (d) the lid gets softer
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 6 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
15. 15.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
16. 16.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
17. 17.⚖️ 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 measure it (c) we change it
18. 18.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a mirror (c) a battery cell (d) a flat table
20. 20.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a mirror (d) a balloon
21. 21.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
22. 22.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
23. 23.⚖️ 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 kind of coins (c) the same ruler (d) distance from the pencil
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) turmeric powder
25. 25.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) bigger on the left (d) equal on both sides
26. 26.⚖️ 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
27. 27.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
30. 30.⚖️ 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 same ruler
31. 31.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a magnet is needed for the ruler lever. (a) True (b) False
33. 33.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
34. 34.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a steering wheel (d) a crowbar
35. 35.⚖️ 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) False (b) True
36. 36.🧺 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) yeast
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 3 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
38. 38.⚙️ Which of these is a lever? (a) a steering wheel (b) a well pulley (c) a spoon lifting a lid (d) a slide
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) coins of one kind (c) yeast (d) a round pencil
40. 40.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed

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