Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 937 · 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.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a wheel and axle (c) an inclined plane (d) a lever
2. 2.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
3. 3.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a flat table (d) a 30 cm ruler
4. 4.🛟 Why should coins be kept away from very small children? (a) they are too shiny (b) they are magnetic (c) they may swallow them (d) they are too cold
5. 5.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a flat table (d) coins of one kind
6. 6.⚖️ 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) where the pencil is (d) the kind of coins
7. 7.True or false: a well pulley is a wheel and axle. (a) True (b) False
8. 8.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) yeast (d) a mirror
9. 9.⚙️ Which simple machine is a ramp? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
10. 10.True or false: a ramp is a lever. (a) False (b) True
11. 11.⚙️ Which of these uses a pulley? (a) a steering wheel (b) a see-saw (c) a flagpole (d) a sloping road
12. 12.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
13. 13.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
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 the one thing we change. (a) True (b) False
15. 15.True or false: a crowbar is a lever. (a) False (b) True
16. 16.⚖️ 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
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a spoon lifting a lid (c) a well pulley (d) a sloping road
19. 19.🔮 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 right side (c) the left side (d) both go up
20. 20.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
21. 21.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
22. 22.True or false: a flagpole is a lever. (a) True (b) False
23. 23.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a ramp (c) a doorknob (d) a bottle opener
24. 24.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
25. 25.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a magnet (b) coins of one kind (c) a flat table (d) a round pencil
26. 26.⚖️ 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) True (b) False
27. 27.True or false: a well pulley uses a pulley. (a) False (b) True
28. 28.⚖️ 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) True (b) False
29. 29.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 4 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?
31. 31.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
32. 32.True or false: turmeric powder is needed for the ruler lever. (a) False (b) True
33. 33.🧺 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 battery cell
34. 34.True or false: a flat table is needed for the ruler lever. (a) True (b) False
35. 35.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
36. 36.⚖️ 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?
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 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?
38. 38.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) a 30 cm ruler (d) turmeric powder
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a flat table (c) a round pencil (d) yeast
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True

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