Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 188 · 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: yeast is not needed for the ruler lever. (a) True (b) False
2. 2.🛟 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
3. 3.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
4. 4.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a mirror
5. 5.🧺 Do we need a magnet for the ruler lever? (a) not needed (b) needed
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 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?
7. 7.⚖️ 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?
8. 8.⚙️ Which simple machine is a flagpole? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 4 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
10. 10.True or false: a magnet is needed for the ruler lever. (a) False (b) True
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a magnet (d) coins of one kind
15. 15.True or false: a tap handle is a wheel and axle. (a) False (b) True
16. 16.True or false: a bottle opener is an inclined plane. (a) True (b) False
17. 17.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the fulcrum (d) the load
18. 18.True or false: a steering wheel is a wheel and axle. (a) True (b) False
19. 19.True or false: a well pulley uses a pulley. (a) True (b) False
20. 20.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a see-saw (c) a bottle opener (d) a ramp
21. 21.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) both go up (d) the right side
22. 22.True or false: a ramp uses a pulley. (a) True (b) False
23. 23.True or false: a flat table is 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 the one thing we change? (a) which side goes down (b) distance from the pencil (c) the number of coins (d) the kind of coins
25. 25.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a balloon (d) a flat table
26. 26.True or false: a doorknob is a wheel and axle. (a) False (b) True
27. 27.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) a battery cell (d) yeast
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 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?
29. 29.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
30. 30.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 10 cm to the left of the pencil. How many coins must you place 10 cm to the right to balance it?
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a battery cell (d) a round pencil
33. 33.True or false: a spoon lifting a lid is a wheel and axle. (a) True (b) False
34. 34.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
35. 35.⚙️ Which simple machine is a tap handle? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
36. 36.⚖️ 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
37. 37.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) a 30 cm ruler (d) a magnet
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
39. 39.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) yeast (d) a flat table

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