Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 449 · 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.⚖️ 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 keep it the same (b) we measure it (c) we change it
2. 2.⚖️ 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
3. 3.🛟 Why should coins be kept away from very small children? (a) they may swallow them (b) they are too shiny (c) they are too cold (d) they are magnetic
4. 4.⚖️ 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) True (b) False
5. 5.⚖️ 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) where the pencil is (b) the number of coins (c) which side goes down (d) distance from the pencil
6. 6.True or false: a spoon lifting a lid is a lever. (a) True (b) False
7. 7.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) a battery cell (d) a flat table
8. 8.⚖️ 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) where the pencil is (d) which side goes down
9. 9.⚙️ Which of these is a wheel and axle? (a) a well pulley (b) a crane (c) a crowbar (d) a tap handle
10. 10.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a see-saw (c) a crane (d) a flagpole
11. 11.🧺 Do we need coins of one kind for the ruler lever? (a) not needed (b) needed
12. 12.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) yeast (d) a 30 cm ruler
13. 13.True or false: a see-saw uses a pulley. (a) False (b) True
14. 14.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) coins of one kind (d) turmeric powder
15. 15.⚙️ Which of these is a lever? (a) a flagpole (b) a spoon lifting a lid (c) a crane (d) a doorknob
16. 16.True or false: a well pulley is a lever. (a) True (b) False
17. 17.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the lid gets softer (d) the spoon is hot
18. 18.⚖️ 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
19. 19.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a crowbar (c) a well pulley (d) a bottle opener
20. 20.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
21. 21.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a 30 cm ruler (c) a magnet (d) a round pencil
22. 22.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) the same (c) impossible (d) easier
23. 23.🔮 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
24. 24.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
25. 25.🛟 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
26. 26.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
27. 27.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) coins of one kind
28. 28.⚖️ 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
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the kind of coins (b) distance from the pencil (c) which side goes down
30. 30.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a flat table (d) a round pencil
32. 32.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
33. 33.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
34. 34.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
35. 35.True or false: a doorknob uses a pulley. (a) False (b) True
36. 36.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 2 cm to the left of the pencil. How many coins must you place 3 cm to the right to balance it?
39. 39.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is what we measure. (a) True (b) False

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