Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 578 · 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 slide is an inclined plane. (a) False (b) True
2. 2.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down
3. 3.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
4. 4.⚖️ 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) distance from the pencil (c) which side goes down (d) where the pencil is
5. 5.🧺 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 30 cm ruler (d) a battery cell
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) both go up (b) neither, it balances (c) the right side (d) the left side
7. 7.True or false: a tap handle is a lever. (a) False (b) True
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) flick coins at faces (d) press it gently
11. 11.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
12. 12.True or false: a mirror is needed for the ruler lever. (a) True (b) False
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
14. 14.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a steering wheel (c) a well pulley (d) a slide
15. 15.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
16. 16.⚖️ 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
17. 17.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
18. 18.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
19. 19.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
20. 20.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the lid gets softer (d) the spoon is magnetic
21. 21.⚖️ 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 measure it (b) we change it (c) we keep it the same
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 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?
23. 23.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
24. 24.⚖️ 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
25. 25.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit on the middle (c) sit farther from middle (d) sit closer to middle
26. 26.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
27. 27.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
28. 28.⚖️ 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) True (b) False
29. 29.⚙️ Which of these is an inclined plane? (a) a crane (b) a well pulley (c) a sloping road (d) a steering wheel
30. 30.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
31. 31.⚖️ 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
32. 32.⚙️ Which simple machine is a ramp? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
34. 34.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 8 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 5 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.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a magnet
39. 39.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) yeast

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