Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 872 · 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.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crowbar (c) a see-saw (d) a tap handle
3. 3.⚙️ Which of these is a wheel and axle? (a) a crane (b) a slide (c) a bottle opener (d) a doorknob
4. 4.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a 30 cm ruler (d) a battery cell
5. 5.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) coins of one kind
6. 6.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
7. 7.True or false: a slide is an inclined plane. (a) True (b) False
8. 8.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 3 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
9. 9.⚖️ 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
10. 10.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
11. 11.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
12. 12.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) the kind of coins (b) distance from the pencil (c) which side goes down (d) the number of coins
14. 14.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 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?
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 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?
16. 16.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
17. 17.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
18. 18.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
19. 19.⚖️ 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) False (b) True
20. 20.🧺 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
21. 21.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
22. 22.⚖️ 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) False (b) True
23. 23.⚖️ 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) which side goes down (c) the kind of coins (d) distance from the pencil
24. 24.🔮 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 right side (c) the left side (d) neither, it balances
25. 25.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) yeast (d) coins of one kind
26. 26.🛟 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
27. 27.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
28. 28.⚙️ Which simple machine is a well pulley? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
29. 29.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) yeast (b) coins of one kind (c) a 30 cm ruler (d) a flat table
30. 30.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
31. 31.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.True or false: a crowbar is an inclined plane. (a) True (b) False
34. 34.True or false: a crowbar is a wheel and axle. (a) False (b) True
35. 35.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
37. 37.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
38. 38.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the axle (d) the fulcrum
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) coins of one kind (c) a 30 cm ruler (d) a flat table
40. 40.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False

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