Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 340 · 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.⚖️ 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?
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a flat table (d) a magnet
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a round pencil (d) turmeric powder
4. 4.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) a round pencil
5. 5.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) the lid gets softer (d) a lever boosts your push
6. 6.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 10 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
8. 8.⚙️ Which of these is a wheel and axle? (a) a bottle opener (b) a slide (c) a see-saw (d) a doorknob
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a mirror (d) a 30 cm ruler
10. 10.⚖️ What is the turning point of a lever called? (a) the axle (b) the load (c) the fulcrum (d) the effort
11. 11.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) turmeric powder
13. 13.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) always 10 (c) zero (d) bigger on the left
14. 14.True or false: a doorknob is a lever. (a) True (b) False
15. 15.🧺 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 round pencil
16. 16.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a battery cell (d) yeast
17. 17.True or false: a sloping road is a wheel and axle. (a) False (b) True
18. 18.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
20. 20.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
21. 21.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
22. 22.⚖️ 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
23. 23.True or false: a well pulley is a lever. (a) True (b) False
24. 24.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a tap handle (c) a crane (d) a sloping road
25. 25.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
26. 26.⚙️ Which of these is an inclined plane? (a) a slide (b) a flagpole (c) a crowbar (d) a bottle opener
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: distance from the pencil is the one thing we change. (a) True (b) False
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) turmeric powder (c) a mirror (d) a magnet
31. 31.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
32. 32.⚖️ 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
33. 33.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) stand on the ruler (d) flick coins at faces
34. 34.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
35. 35.True or false: a slide is an inclined plane. (a) False (b) True
36. 36.⚙️ Which simple machine is a tap handle? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
37. 37.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
38. 38.True or false: a doorknob is a wheel and axle. (a) True (b) False
39. 39.🔮 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) both go up (c) the left side (d) the right side
40. 40.⚖️ 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

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