Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 310 · 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.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the lid gets softer (b) a lever boosts your push (c) the spoon is hot (d) the spoon is magnetic
2. 2.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
3. 3.True or false: yeast is not needed for the ruler lever. (a) False (b) True
4. 4.⚖️ 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
5. 5.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
6. 6.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
7. 7.True or false: a round pencil is not needed for the ruler lever. (a) True (b) False
8. 8.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
9. 9.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit on the middle (b) sit farther from middle (c) sit closer to middle (d) jump up and down
10. 10.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) a balloon
11. 11.⚖️ 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?
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.⚙️ Which of these uses a pulley? (a) a crane (b) a see-saw (c) a doorknob (d) a sloping road
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a flat table
18. 18.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
19. 19.⚖️ 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) which side goes down (c) distance from the pencil (d) the same ruler
20. 20.⚖️ 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?
21. 21.⚖️ 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?
22. 22.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) press it gently (c) bend it till it snaps (d) flick coins at faces
23. 23.True or false: a battery cell is needed for the ruler lever. (a) True (b) False
24. 24.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a mirror (c) turmeric powder (d) a balloon
25. 25.🔮 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
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) turmeric powder
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (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 30 cm ruler (c) a magnet (d) a round pencil
29. 29.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they may swallow them (c) they are magnetic (d) they are too cold
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 what we measure. (a) True (b) False
31. 31.⚖️ 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
32. 32.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a ramp (c) a tap handle (d) a see-saw
33. 33.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
35. 35.⚖️ 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 kind of coins (b) the same ruler (c) where the pencil is (d) distance from the pencil
36. 36.True or false: a doorknob is a wheel and axle. (a) True (b) False
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 3 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
38. 38.⚖️ 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) the same ruler (c) distance from the pencil
39. 39.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
40. 40.True or false: a steering wheel is a lever. (a) True (b) False

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