Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 778 · 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.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) turmeric powder (d) coins of one kind
3. 3.⚙️ Which simple machine is a doorknob? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) yeast (d) a flat table
5. 5.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a mirror (d) coins of one kind
6. 6.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a crowbar (c) a see-saw (d) a well pulley
7. 7.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
9. 9.⚙️ Which of these uses a pulley? (a) a slide (b) a flagpole (c) a crowbar (d) a tap handle
10. 10.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) turmeric powder (c) a round pencil (d) a flat table
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
12. 12.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crane (c) a bottle opener (d) a slide
13. 13.⚖️ 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
14. 14.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a wheel and axle (c) a pulley (d) an inclined plane
15. 15.True or false: a flat table is needed for the ruler lever. (a) True (b) False
16. 16.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
17. 17.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) turmeric powder (d) a magnet
18. 18.⚖️ 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
19. 19.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
20. 20.⚙️ Which simple machine is a bottle opener? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
21. 21.🧺 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 magnet (d) a round pencil
22. 22.⚖️ 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
23. 23.🧺 Do we need yeast for the ruler lever? (a) not needed (b) needed
24. 24.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a round pencil
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.🔮 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 right side (b) the left side (c) both go up (d) neither, it balances
27. 27.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
28. 28.True or false: a magnet is needed for the ruler lever. (a) True (b) False
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) bend it till it snaps (c) flick coins at faces (d) stand on the ruler
30. 30.🧺 Which of these is needed for the ruler lever? (a) yeast (b) turmeric powder (c) a balloon (d) coins of one kind
31. 31.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
32. 32.True or false: a steering wheel uses a pulley. (a) True (b) False
33. 33.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
34. 34.⚙️ Which of these is a lever? (a) a spoon lifting a lid (b) a ramp (c) a well pulley (d) a flagpole
35. 35.⚖️ 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
36. 36.⚙️ Which of these is an inclined plane? (a) a doorknob (b) a crowbar (c) a sloping road (d) a see-saw
37. 37.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) a lever boosts your push (b) the spoon is magnetic (c) the lid gets softer (d) the spoon is hot
38. 38.⚖️ 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?
39. 39.True or false: a slide is a lever. (a) False (b) True
40. 40.⚖️ 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) distance from the pencil (c) the kind of coins (d) which side goes down

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