Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 98 · 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 same ruler is the one thing we change. (a) False (b) True
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
3. 3.⚙️ Which simple machine is a steering wheel? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
4. 4.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
5. 5.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too shiny (c) they may swallow them (d) they are too cold
6. 6.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a spoon lifting a lid (c) a ramp (d) a crane
7. 7.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a flat table (d) a round pencil
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
9. 9.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
10. 10.True or false: coins of one kind is not 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 same ruler”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
13. 13.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a mirror (d) a flat table
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
16. 16.True or false: a crane is a lever. (a) True (b) False
17. 17.True or false: a flat table is not needed for the ruler lever. (a) True (b) False
18. 18.⚖️ 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 keep it the same (b) we change it (c) we measure it
19. 19.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
20. 20.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
21. 21.⚖️ 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?
22. 22.True or false: a tap handle is a wheel and axle. (a) False (b) True
23. 23.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) coins of one kind (d) yeast
25. 25.⚖️ 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
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.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
28. 28.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
29. 29.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) turmeric powder (d) a round pencil
31. 31.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a 30 cm ruler (d) coins of one kind
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is kept the same. (a) False (b) True
35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 3 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?
37. 37.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
38. 38.⚙️ Which of these is a lever? (a) a ramp (b) a bottle opener (c) a well pulley (d) a steering wheel
39. 39.⚖️ 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
40. 40.⚙️ Which of these is an inclined plane? (a) a crane (b) a see-saw (c) a flagpole (d) a sloping road

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