Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 920 · 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? True or false: the number of coins is what we measure. (a) False (b) True
2. 2.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
3. 3.True or false: a slide is an inclined plane. (a) False (b) True
4. 4.True or false: a steering wheel uses a pulley. (a) True (b) False
5. 5.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a 30 cm ruler (c) a flat table (d) a round pencil
7. 7.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a battery cell (c) a magnet (d) yeast
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 10 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
9. 9.True or false: a crowbar is a wheel and axle. (a) True (b) False
10. 10.True or false: coins of one kind 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? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the same ruler
12. 12.True or false: a well pulley uses a pulley. (a) True (b) False
13. 13.⚖️ 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?
14. 14.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
17. 17.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
18. 18.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
19. 19.⚖️ 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) where the pencil is (b) the number of coins (c) the same ruler (d) distance from the pencil
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 keep it the same (b) we measure it (c) we change it
21. 21.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a magnet (d) a 30 cm ruler
22. 22.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a balloon (d) a round pencil
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a round pencil (d) a flat table
24. 24.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
25. 25.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
27. 27.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a ramp (c) a crowbar (d) a sloping road
28. 28.True or false: a ramp is a lever. (a) True (b) False
29. 29.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
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) the number of coins (b) distance from the pencil (c) which side goes down
31. 31.⚖️ 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?
32. 32.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a balloon
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
35. 35.🔮 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) the right side (c) both go up (d) neither, it balances
36. 36.⚖️ 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
37. 37.⚖️ 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?
38. 38.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the effort (d) the axle
39. 39.⚙️ Which simple machine is a see-saw? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
40. 40.⚖️ 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

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