Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 751 · 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: which side goes down is what we measure. (a) False (b) True
2. 2.True or false: a doorknob is an inclined plane. (a) False (b) True
3. 3.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a tap handle (d) a sloping road
4. 4.True or false: a crowbar is a lever. (a) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) turmeric powder (c) yeast (d) a round pencil
6. 6.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
8. 8.⚖️ 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) True (b) False
9. 9.⚙️ Which simple machine is a flagpole? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) coins of one kind (d) a round pencil
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) a flat table (d) a 30 cm ruler
14. 14.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
15. 15.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.True or false: a sloping road is a wheel and axle. (a) True (b) False
17. 17.True or false: a flagpole is an inclined plane. (a) False (b) True
18. 18.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a flat table (d) a 30 cm ruler
19. 19.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
20. 20.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) the same ruler (c) where the pencil is (d) which side goes down
23. 23.🔮 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) both go up (c) neither, it balances (d) the right side
24. 24.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a see-saw (c) a slide (d) a well pulley
25. 25.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a flagpole (c) a ramp (d) a crowbar
26. 26.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is kept the same. (a) True (b) False
29. 29.⚙️ Which of these is an inclined plane? (a) a slide (b) a see-saw (c) a well pulley (d) a crowbar
30. 30.⚖️ 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 change it (c) we keep it the same
31. 31.⚖️ What is the turning point of a lever called? (a) the effort (b) the fulcrum (c) the axle (d) the load
32. 32.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
33. 33.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
34. 34.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
35. 35.🛟 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
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
37. 37.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a battery cell (c) a mirror (d) a balloon
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
39. 39.⚙️ Which of these uses a pulley? (a) a crowbar (b) a spoon lifting a lid (c) a flagpole (d) a steering wheel
40. 40.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed

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