Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 403 · 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.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
2. 2.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
3. 3.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
4. 4.⚙️ Which of these is a lever? (a) a tap handle (b) a ramp (c) a slide (d) a bottle opener
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.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) both go up (d) the right side
7. 7.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
8. 8.⚖️ 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 measure it (c) we change it
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) True (b) False
11. 11.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a crane (c) a doorknob (d) a ramp
12. 12.True or false: a sloping road is a wheel and axle. (a) True (b) False
13. 13.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
14. 14.🧺 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 battery cell (d) coins of one kind
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 2 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?
16. 16.⚖️ 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) the kind of coins (c) the same ruler (d) which side goes down
17. 17.⚖️ 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 3 cm to the right to balance it?
18. 18.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
19. 19.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a mirror (d) a balloon
20. 20.🧺 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 round pencil (d) a balloon
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a mirror (d) coins of one kind
22. 22.True or false: a mirror is needed for the ruler lever. (a) False (b) True
23. 23.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
25. 25.⚖️ 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) False (b) True
26. 26.⚖️ 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
27. 27.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the effort (d) the load
28. 28.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a flat table (d) a mirror
29. 29.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 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?
30. 30.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) yeast (d) coins of one kind
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) the number of coins (b) which side goes down (c) distance from the pencil
34. 34.True or false: a magnet is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a balloon (c) coins of one kind (d) a flat table
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) a magnet
38. 38.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
39. 39.⚙️ Which of these is a lever? (a) a steering wheel (b) a ramp (c) a spoon lifting a lid (d) a doorknob
40. 40.⚖️ A ruler balances on a pencil at its middle. You place 5 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?

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