Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 197 · 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.🧺 Do we need a mirror for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ 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 change it (c) we measure it
3. 3.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
5. 5.⚖️ 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
6. 6.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a balloon (d) coins of one kind
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 1 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
8. 8.True or false: a flat table is not needed for the ruler lever. (a) False (b) True
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) yeast
10. 10.True or false: a ramp is an inclined plane. (a) True (b) False
11. 11.⚙️ Which of these uses a pulley? (a) a see-saw (b) a spoon lifting a lid (c) a well pulley (d) a bottle opener
12. 12.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit closer to middle (c) sit on the middle (d) jump up and down
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a mirror (c) a round pencil (d) coins of one kind
15. 15.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
16. 16.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
18. 18.⚙️ Which simple machine is a see-saw? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
21. 21.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
22. 22.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the same ruler”? (a) we change it (b) we keep it the same (c) we measure it
23. 23.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a mirror (d) a magnet
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.True or false: a magnet is needed for the ruler lever. (a) True (b) False
26. 26.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 4 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?
27. 27.⚖️ 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) False (b) True
28. 28.True or false: a sloping road is an inclined plane. (a) True (b) False
29. 29.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
30. 30.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) press it gently (c) flick coins at faces (d) stand on the ruler
31. 31.🧺 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 mirror (d) a 30 cm ruler
32. 32.True or false: a 30 cm ruler is not needed for the ruler lever. (a) True (b) False
33. 33.🔮 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 right side (b) the left side (c) neither, it balances (d) both go up
34. 34.⚖️ 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
35. 35.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they may swallow them (c) they are too shiny (d) they are magnetic
36. 36.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a balloon (d) a battery cell
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) the same ruler (c) which side goes down
38. 38.⚙️ Which of these is a lever? (a) a tap handle (b) a flagpole (c) a doorknob (d) a see-saw
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
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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