Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 826 · 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 needed for the ruler lever. (a) True (b) False
2. 2.⚖️ 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 change it (b) we keep it the same (c) we measure it
3. 3.⚖️ 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) distance from the pencil (b) the number of coins (c) the kind of coins (d) the same ruler
4. 4.⚖️ What is the turning point of a lever called? (a) the load (b) the effort (c) the fulcrum (d) the axle
5. 5.⚙️ Which of these is a lever? (a) a sloping road (b) a flagpole (c) a ramp (d) a see-saw
6. 6.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
7. 7.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) bend it till it snaps (d) press it gently
8. 8.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
9. 9.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
10. 10.True or false: a well pulley is a wheel and axle. (a) True (b) False
11. 11.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a magnet (c) a 30 cm ruler (d) turmeric powder
12. 12.⚖️ 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
13. 13.⚖️ Coins on the two sides balance when coins × distance is ___. (a) equal on both sides (b) zero (c) always 10 (d) bigger on the left
14. 14.⚖️ 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
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) easier (c) impossible (d) the same
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.⚖️ 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
18. 18.⚖️ 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 number of coins (b) the kind of coins (c) which side goes down (d) distance from the pencil
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) a 30 cm ruler (d) coins of one kind
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 4 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?
22. 22.True or false: a doorknob is an inclined plane. (a) True (b) False
23. 23.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
24. 24.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False
25. 25.🧺 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 magnet (d) a 30 cm ruler
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) True (b) False
27. 27.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
28. 28.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) coins of one kind (d) a mirror
29. 29.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a well pulley (c) a ramp (d) a see-saw
30. 30.⚙️ Which simple machine is a well pulley? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) a round pencil
32. 32.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
33. 33.🧺 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
34. 34.⚙️ Which simple machine is a slide? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
35. 35.⚖️ 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
36. 36.⚖️ A ruler balances on a pencil at its middle. You place 2 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?
37. 37.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
38. 38.True or false: yeast is not needed for the ruler lever. (a) False (b) True
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a 30 cm ruler (d) a flat table
40. 40.⚖️ 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

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