Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 5 · 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.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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?
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) equal on both sides (c) zero (d) bigger on the left
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) a balloon (d) yeast
6. 6.⚖️ 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
7. 7.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
8. 8.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
10. 10.True or false: a flat table is needed for the ruler lever. (a) True (b) False
11. 11.⚖️ 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
12. 12.⚖️ 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) distance from the pencil (c) the same ruler (d) which side goes down
13. 13.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
14. 14.🔮 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) neither, it balances (c) the right side (d) both go up
15. 15.True or false: a sloping road is an inclined plane. (a) True (b) False
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.⚖️ 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?
19. 19.True or false: a tap handle is a wheel and axle. (a) False (b) True
20. 20.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a steering wheel (c) a bottle opener (d) a crane
21. 21.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too cold (d) they are too shiny
22. 22.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the effort (d) the axle
23. 23.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a battery cell (d) coins of one kind
25. 25.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
26. 26.🛟 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
27. 27.True or false: a sloping road is a wheel and axle. (a) True (b) False
28. 28.⚖️ 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) which side goes down (c) the number of coins
29. 29.⚖️ 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?
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) where the pencil is (b) which side goes down (c) distance from the pencil
31. 31.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) where the pencil is (b) distance from the pencil (c) the number of coins (d) which side goes down
32. 32.⚙️ Which of these is a wheel and axle? (a) a slide (b) a crowbar (c) a steering wheel (d) a see-saw
33. 33.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a crowbar (d) a crane
34. 34.⚙️ Which of these is a lever? (a) a crane (b) a slide (c) a ramp (d) a bottle opener
35. 35.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
36. 36.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
37. 37.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
38. 38.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a 30 cm ruler (c) yeast (d) a mirror
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
40. 40.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True

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