Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 299 · 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.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a sloping road (c) a tap handle (d) a flagpole
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) yeast
3. 3.⚙️ Which of these uses a pulley? (a) a flagpole (b) a tap handle (c) a bottle opener (d) a doorknob
4. 4.⚙️ Which of these uses a pulley? (a) a see-saw (b) a well pulley (c) a doorknob (d) a tap handle
5. 5.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
6. 6.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
8. 8.⚙️ Which simple machine is a tap handle? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a 30 cm ruler (d) a mirror
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.True or false: a flat table is needed for the ruler lever. (a) True (b) False
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a magnet (d) a round pencil
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a round pencil (d) a magnet
14. 14.True or false: a see-saw uses a pulley. (a) True (b) False
15. 15.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
17. 17.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
19. 19.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
20. 20.⚖️ 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
21. 21.True or false: a ramp is a lever. (a) False (b) True
22. 22.⚖️ 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 keep it the same (b) we measure it (c) we change it
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a battery cell (b) coins of one kind (c) a flat table (d) a round pencil
24. 24.⚖️ 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 4 cm to the right to balance it?
25. 25.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) turmeric powder (d) a balloon
26. 26.⚙️ Which of these is a lever? (a) a well pulley (b) a slide (c) a crane (d) a crowbar
27. 27.🔮 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 right side (c) both go up (d) the left side
28. 28.⚖️ What is the turning point of a lever called? (a) the load (b) the fulcrum (c) the axle (d) the effort
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) where the pencil is (c) the number of coins (d) the kind of coins
30. 30.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
31. 31.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crowbar (c) a slide (d) a crane
32. 32.True or false: a flagpole is a lever. (a) True (b) False
33. 33.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a magnet (c) coins of one kind (d) a balloon
34. 34.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
35. 35.⚖️ 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?
36. 36.⚖️ 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 spoon is hot (d) the lid gets softer
37. 37.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
38. 38.⚙️ Which of these is a lever? (a) a crane (b) a bottle opener (c) a tap handle (d) a sloping road
39. 39.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
40. 40.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too cold (c) they are magnetic (d) they are too shiny

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