Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 147 · 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.⚖️ 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) the same ruler (c) the number of coins (d) which side goes down
2. 2.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
3. 3.⚖️ 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 8 cm to the right to balance it?
4. 4.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) yeast (d) turmeric powder
5. 5.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
6. 6.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a magnet
7. 7.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
9. 9.🛟 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
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) harder (d) easier
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) where the pencil is (c) the kind of coins (d) which side goes down
13. 13.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a round pencil (d) a flat table
15. 15.⚖️ 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 same ruler (b) which side goes down (c) distance from the pencil
16. 16.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
17. 17.⚙️ Which of these uses a pulley? (a) a sloping road (b) a ramp (c) a steering wheel (d) a crane
18. 18.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a balloon (d) a round pencil
19. 19.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) sit farther from middle (d) jump up and down
20. 20.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
21. 21.True or false: a crane is an inclined plane. (a) True (b) False
22. 22.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
24. 24.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
25. 25.⚖️ 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 measure it (c) we change it
26. 26.⚖️ 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?
27. 27.True or false: a bottle opener uses a pulley. (a) False (b) True
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) a balloon
30. 30.⚖️ 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
31. 31.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
33. 33.True or false: a flat table is needed for the ruler lever. (a) False (b) True
34. 34.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a battery cell (d) coins of one kind
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) False (b) True
36. 36.⚖️ 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?
37. 37.⚙️ Which of these is a lever? (a) a flagpole (b) a crane (c) a slide (d) a crowbar
38. 38.⚖️ 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 measure it (b) we keep it the same (c) we change it
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) coins of one kind (d) turmeric powder
40. 40.⚖️ 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

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