Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 975 · 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 magnet is not needed for the ruler lever. (a) True (b) False
2. 2.⚖️ What is the turning point of a lever called? (a) the axle (b) the fulcrum (c) the load (d) the effort
3. 3.⚖️ 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
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is the one thing we change. (a) False (b) True
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
6. 6.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
7. 7.⚖️ 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 same ruler (b) the number of coins (c) which side goes down (d) distance from the pencil
8. 8.🔮 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 left side (b) both go up (c) neither, it balances (d) the right side
9. 9.⚙️ Which of these uses a pulley? (a) a crane (b) a ramp (c) a steering wheel (d) a crowbar
10. 10.🧺 Which of these is needed for the ruler lever? (a) a battery cell (b) yeast (c) coins of one kind (d) turmeric powder
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) True (b) False
12. 12.True or false: a bottle opener is a lever. (a) False (b) True
13. 13.⚖️ 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) a lever boosts your push (d) the spoon is magnetic
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) yeast (d) a 30 cm ruler
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) harder (c) easier (d) the same
16. 16.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a magnet (c) coins of one kind (d) a 30 cm ruler
17. 17.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
18. 18.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a slide (c) a see-saw (d) a crane
19. 19.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
21. 21.True or false: a well pulley is a lever. (a) False (b) True
22. 22.True or false: a crane is an inclined plane. (a) True (b) False
23. 23.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) yeast (c) a 30 cm ruler (d) a balloon
24. 24.True or false: a tap handle is an inclined plane. (a) True (b) False
25. 25.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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 bottle opener uses a pulley. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: a steering wheel is a wheel and axle. (a) True (b) False
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
32. 32.⚙️ Which simple machine is a sloping road? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
33. 33.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) which side goes down (b) where the pencil is (c) distance from the pencil (d) the number of coins
34. 34.True or false: a well pulley is an inclined plane. (a) False (b) True
35. 35.⚙️ Which of these is a wheel and axle? (a) a tap handle (b) a crane (c) a sloping road (d) a well pulley
36. 36.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a 30 cm ruler (c) coins of one kind (d) a flat table
38. 38.🛟 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
39. 39.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) zero (d) equal on both sides
40. 40.True or false: a battery cell is needed for the ruler lever. (a) False (b) True

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