Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 183 · 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.True or false: a crowbar uses a pulley. (a) False (b) True
2. 2.⚙️ Which of these uses a pulley? (a) a sloping road (b) a ramp (c) a see-saw (d) a flagpole
3. 3.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) bend it till it snaps (d) stand on the ruler
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance 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) the left side (b) the right side (c) neither, it balances (d) both go up
7. 7.True or false: yeast is needed for the ruler lever. (a) False (b) True
8. 8.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a balloon (d) a battery cell
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table
10. 10.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) distance from the pencil (c) the same ruler
11. 11.⚖️ 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 same ruler (b) the kind of coins (c) the number of coins (d) which side goes down
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a magnet (d) a 30 cm ruler
13. 13.⚖️ 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
14. 14.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
15. 15.⚖️ 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 change it (b) we measure it (c) we keep it the same
16. 16.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are too cold (c) they are magnetic (d) they may swallow them
17. 17.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
19. 19.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
20. 20.⚖️ 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) True (b) False
21. 21.True or false: a well pulley is a wheel and axle. (a) True (b) False
22. 22.⚙️ Which of these is a lever? (a) a slide (b) a flagpole (c) a ramp (d) a crowbar
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) a balloon
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is kept the same. (a) False (b) True
25. 25.⚖️ 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?
26. 26.True or false: a tap handle uses a pulley. (a) False (b) True
27. 27.True or false: coins of one kind is not needed for the ruler lever. (a) False (b) True
28. 28.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a flat table (c) a round pencil (d) coins of one kind
29. 29.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a tap handle (c) a steering wheel (d) a spoon lifting a lid
30. 30.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) easier (d) harder
31. 31.⚖️ 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) the same ruler (b) distance from the pencil (c) the kind of coins (d) which side goes down
32. 32.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
33. 33.⚖️ 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) True (b) False
34. 34.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil and 5 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a well pulley (c) a sloping road (d) a steering wheel
37. 37.⚖️ 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
38. 38.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
39. 39.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
40. 40.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley

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