Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 883 · 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 load (c) the fulcrum (d) the effort
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a 30 cm ruler
3. 3.True or false: a steering wheel is an inclined plane. (a) False (b) True
4. 4.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
5. 5.True or false: a crane uses a pulley. (a) True (b) False
6. 6.🔮 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) the right side (d) neither, it balances
7. 7.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
9. 9.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) coins of one kind (c) a 30 cm ruler (d) a balloon
11. 11.⚖️ 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
12. 12.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a flagpole (d) a sloping road
13. 13.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) a 30 cm ruler (c) a flat table (d) a round pencil
14. 14.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 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?
16. 16.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
17. 17.⚖️ 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) where the pencil is (b) the same ruler (c) distance from the pencil (d) the number of coins
18. 18.⚖️ 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 keep it the same (b) we change it (c) we measure it
19. 19.True or false: a sloping road uses a pulley. (a) False (b) True
20. 20.True or false: yeast is not needed for the ruler lever. (a) False (b) True
21. 21.⚖️ 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
22. 22.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
23. 23.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) which side goes down (b) where the pencil is (c) distance from the pencil
25. 25.⚖️ 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 change it (c) we measure it
26. 26.True or false: a slide is an inclined plane. (a) False (b) True
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a magnet (c) a flat table (d) a balloon
29. 29.⚙️ Which of these is a lever? (a) a well pulley (b) a tap handle (c) a spoon lifting a lid (d) a doorknob
30. 30.⚖️ 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
31. 31.True or false: a tap handle is an inclined plane. (a) True (b) False
32. 32.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the lid gets softer (c) a lever boosts your push (d) the spoon is hot
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) where the pencil is (b) the same ruler (c) which side goes down (d) distance from the pencil
34. 34.True or false: a flagpole is an inclined plane. (a) True (b) False
35. 35.⚖️ 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 keep it the same (c) we change it
36. 36.True or false: a steering wheel is a wheel and axle. (a) False (b) True
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
38. 38.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a mirror (d) a 30 cm ruler
39. 39.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
40. 40.⚙️ Which of these is a lever? (a) a see-saw (b) a doorknob (c) a flagpole (d) a ramp

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