Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 397 · 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.🔮 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) the right side (c) the left side (d) both go up
2. 2.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) turmeric powder (d) coins of one kind
3. 3.⚙️ Which of these is an inclined plane? (a) a spoon lifting a lid (b) a steering wheel (c) a crowbar (d) a slide
4. 4.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
5. 5.True or false: a bottle opener is a lever. (a) False (b) True
6. 6.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
7. 7.⚖️ 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
8. 8.⚙️ Which simple machine is a sloping road? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
9. 9.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a flat table (d) a balloon
10. 10.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) bigger on the left (c) zero (d) always 10
11. 11.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.True or false: a crane is a lever. (a) False (b) True
14. 14.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
15. 15.⚙️ Which of these is a lever? (a) a bottle opener (b) a tap handle (c) a doorknob (d) a well pulley
16. 16.⚖️ 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 kind of coins (b) where the pencil is (c) distance from the pencil (d) the same ruler
17. 17.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they may swallow them (d) they are too shiny
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a bottle opener (c) a doorknob (d) a slide
20. 20.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a balloon (d) a 30 cm ruler
21. 21.⚙️ Which of these uses a pulley? (a) a doorknob (b) a see-saw (c) a crowbar (d) a well pulley
22. 22.⚖️ 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 magnetic (d) the spoon is hot
23. 23.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
24. 24.⚖️ 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
25. 25.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the effort (c) the load (d) the axle
26. 26.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
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) the number of coins (b) distance from the pencil (c) which side goes down
28. 28.⚙️ Which of these is a lever? (a) a ramp (b) a see-saw (c) a sloping road (d) a crane
29. 29.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
30. 30.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
31. 31.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
32. 32.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) easier (d) impossible
33. 33.⚖️ 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
34. 34.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a flat table (c) a 30 cm ruler (d) coins of one kind
36. 36.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a flat table (c) a battery cell (d) a 30 cm ruler
37. 37.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
38. 38.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
39. 39.⚙️ Which of these is a lever? (a) a ramp (b) a slide (c) a sloping road (d) a spoon lifting a lid
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 what we measure. (a) True (b) False

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