Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 459 · 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) both go up (b) the left side (c) the right side (d) neither, it balances
2. 2.⚙️ Which simple machine is a crane? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
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) False (b) True
4. 4.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) turmeric powder (c) a battery cell (d) a mirror
5. 5.⚖️ 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) distance from the pencil (c) where the pencil is (d) the kind of coins
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
7. 7.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are magnetic (c) they are too shiny (d) they are too cold
8. 8.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
9. 9.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
10. 10.True or false: a steering wheel is a wheel and axle. (a) False (b) True
11. 11.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a mirror (c) a flat table (d) a round pencil
13. 13.⚖️ 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?
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.⚖️ 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 keep it the same (b) we measure it (c) we change it
16. 16.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) press it gently (d) flick coins at faces
17. 17.True or false: a mirror is needed for the ruler lever. (a) True (b) False
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) yeast
19. 19.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
20. 20.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is what we measure. (a) False (b) True
21. 21.⚖️ 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) distance from the pencil (d) the kind of coins
22. 22.⚖️ 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) the spoon is hot (d) a lever boosts your push
23. 23.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
25. 25.True or false: a sloping road uses a pulley. (a) False (b) True
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a battery cell (c) a round pencil (d) a 30 cm ruler
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 1 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 6 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?
29. 29.⚙️ Which of these is a lever? (a) a slide (b) a spoon lifting a lid (c) a tap handle (d) a crane
30. 30.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
31. 31.⚖️ 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 measure it (b) we keep it the same (c) we change it
32. 32.⚙️ Which of these is a lever? (a) a flagpole (b) a doorknob (c) a well pulley (d) a bottle opener
33. 33.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
34. 34.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
36. 36.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) coins of one kind (d) a battery cell
37. 37.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a magnet (c) a flat table (d) a mirror
38. 38.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a magnet (d) a round pencil
39. 39.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
40. 40.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind

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