Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 526 · 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.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
2. 2.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a battery cell (c) a flat table (d) a round pencil
3. 3.⚖️ 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 3 cm to the right to balance it?
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) yeast (d) a round pencil
5. 5.True or false: a flagpole uses a pulley. (a) False (b) True
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) a flat table
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) the same (c) harder (d) easier
9. 9.⚖️ 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
10. 10.⚙️ Which of these is a lever? (a) a crane (b) a well pulley (c) a doorknob (d) a see-saw
11. 11.🧺 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 flat table (d) a balloon
12. 12.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) yeast (d) a round pencil
13. 13.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
14. 14.🔮 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) the right side (c) the left side (d) neither, it balances
15. 15.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
16. 16.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the lid gets softer (c) the spoon is hot (d) the spoon is magnetic
17. 17.True or false: a slide is a wheel and axle. (a) False (b) True
18. 18.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a battery cell (c) coins of one kind (d) turmeric powder
19. 19.⚖️ 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 closer to middle (d) sit farther from middle
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) False (b) True
21. 21.⚙️ Which of these is an inclined plane? (a) a ramp (b) a bottle opener (c) a steering wheel (d) a flagpole
22. 22.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) a magnet (c) a balloon (d) a 30 cm ruler
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a flat table (d) a round pencil
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) coins of one kind
25. 25.⚙️ Which of these is a lever? (a) a ramp (b) a doorknob (c) a bottle opener (d) a well pulley
26. 26.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
27. 27.⚙️ Which simple machine is a tap handle? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
28. 28.⚙️ Which simple machine is a crowbar? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
29. 29.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a balloon (c) coins of one kind (d) a 30 cm ruler
30. 30.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) flick coins at faces (c) stand on the ruler (d) bend it till it snaps
31. 31.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
32. 32.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
33. 33.⚖️ 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 same ruler (b) which side goes down (c) distance from the pencil
34. 34.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 3 cm to the left of the pencil and 3 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
36. 36.True or false: a well pulley uses a pulley. (a) True (b) False
37. 37.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
38. 38.⚖️ 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 kind of coins
39. 39.⚖️ 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) the number of coins (c) which side goes down
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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