Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 655 · 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 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?
2. 2.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
3. 3.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
4. 4.⚖️ 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 number of coins (b) where the pencil is (c) the kind of coins (d) distance from the pencil
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
6. 6.🧺 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) a magnet
7. 7.True or false: a ramp is an inclined plane. (a) True (b) False
8. 8.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
9. 9.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
10. 10.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a flat table (c) a magnet (d) yeast
11. 11.🛟 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
12. 12.True or false: a flagpole uses a pulley. (a) False (b) True
13. 13.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.⚙️ Which simple machine is a crowbar? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
16. 16.🔮 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 left side (c) neither, it balances (d) the right side
17. 17.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) jump up and down (d) sit on the middle
18. 18.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a sloping road (d) a doorknob
19. 19.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
20. 20.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
21. 21.⚙️ Which of these uses a pulley? (a) a doorknob (b) a tap handle (c) a crane (d) a spoon lifting a lid
22. 22.⚙️ Which of these is a lever? (a) a doorknob (b) a spoon lifting a lid (c) a flagpole (d) a crane
23. 23.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) coins of one kind (d) a round pencil
24. 24.⚙️ Which of these is a lever? (a) a slide (b) a see-saw (c) a well pulley (d) a steering wheel
25. 25.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) the spoon is magnetic (d) a lever boosts your push
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
27. 27.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a round pencil (d) yeast
28. 28.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) equal on both sides (c) zero (d) always 10
29. 29.⚖️ 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
30. 30.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
31. 31.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a mirror (d) a round pencil
33. 33.🧺 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 round pencil (d) a 30 cm ruler
34. 34.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
36. 36.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
37. 37.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
38. 38.True or false: a slide is an inclined plane. (a) True (b) False
39. 39.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) False (b) True

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