Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 476 · 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 of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a 30 cm ruler (d) turmeric powder
2. 2.True or false: a bottle opener is a wheel and axle. (a) True (b) False
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the kind of coins”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
5. 5.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
7. 7.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
9. 9.True or false: a balloon is needed for the ruler lever. (a) False (b) True
10. 10.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crowbar (c) a bottle opener (d) a see-saw
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
12. 12.⚖️ 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
13. 13.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
14. 14.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit closer to middle (d) sit on the middle
15. 15.⚖️ 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 same ruler (b) the number of coins (c) the kind of coins (d) distance from the pencil
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a mirror (c) a 30 cm ruler (d) a round pencil
17. 17.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they may swallow them (d) they are magnetic
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) a round pencil (c) a flat table (d) a 30 cm ruler
19. 19.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) bend it till it snaps (d) stand on the ruler
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) a round pencil (c) coins of one kind (d) a 30 cm ruler
24. 24.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
25. 25.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
26. 26.⚖️ 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?
27. 27.⚖️ 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 keep it the same (c) we measure it
28. 28.🔮 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
29. 29.⚖️ 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) the number of coins (c) distance from the pencil
30. 30.⚙️ Which of these is an inclined plane? (a) a ramp (b) a steering wheel (c) a flagpole (d) a crane
31. 31.True or false: a well pulley uses a pulley. (a) True (b) False
32. 32.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
34. 34.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
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) True (b) False
36. 36.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
38. 38.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
39. 39.True or false: a crane uses a pulley. (a) False (b) True
40. 40.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever

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