Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 482 · 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.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
2. 2.⚖️ 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 change it (b) we keep it the same (c) we measure it
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the number of coins (b) the kind of coins (c) where the pencil is (d) which side goes down
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) coins of one kind
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
7. 7.⚖️ 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) distance from the pencil (b) which side goes down (c) the number of coins (d) the kind of coins
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) a round pencil
9. 9.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
10. 10.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) coins of one kind (d) a magnet
11. 11.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
12. 12.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
13. 13.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a 30 cm ruler (d) a magnet
14. 14.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
15. 15.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
16. 16.True or false: a ramp uses a pulley. (a) False (b) True
17. 17.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.True or false: yeast is needed for the ruler lever. (a) True (b) False
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
21. 21.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
22. 22.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) turmeric powder (c) coins of one kind (d) a round pencil
23. 23.True or false: a crowbar is a lever. (a) False (b) True
24. 24.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
25. 25.⚖️ 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
26. 26.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
27. 27.🧺 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 magnet (d) coins of one kind
28. 28.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
29. 29.True or false: a bottle opener is a lever. (a) True (b) False
30. 30.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) True (b) False
31. 31.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a round pencil (d) turmeric powder
32. 32.🔮 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
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the number of coins (c) which side goes down
34. 34.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
35. 35.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
36. 36.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) equal on both sides (c) bigger on the left (d) always 10
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) coins of one kind (d) a round pencil
38. 38.True or false: a see-saw is an inclined plane. (a) True (b) False
39. 39.True or false: a bottle opener is an inclined plane. (a) False (b) True
40. 40.True or false: a balloon is needed for the ruler lever. (a) True (b) False

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