Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 453 · 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? True or false: where the pencil is is kept the same. (a) True (b) False
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) a round pencil (d) turmeric powder
3. 3.⚖️ 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
4. 4.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
5. 5.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a flat table (c) a magnet (d) a battery cell
6. 6.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
7. 7.⚙️ Which of these is a wheel and axle? (a) a spoon lifting a lid (b) a doorknob (c) a crane (d) a slide
8. 8.⚖️ 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
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.True or false: a bottle opener uses a pulley. (a) True (b) False
11. 11.🛟 Why should coins be kept away from very small children? (a) they are too cold (b) they are too shiny (c) they are magnetic (d) they may swallow them
12. 12.True or false: a mirror is needed for the ruler lever. (a) True (b) False
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 4 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
14. 14.🧺 Do we need a mirror for the ruler lever? (a) needed (b) not needed
15. 15.⚖️ 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) where the pencil is
16. 16.🔮 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) neither, it balances (c) the left side (d) both go up
17. 17.True or false: a tap handle is a wheel and axle. (a) True (b) False
18. 18.True or false: a bottle opener is an inclined plane. (a) False (b) True
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a battery cell (c) coins of one kind (d) a flat table
21. 21.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a doorknob (c) a bottle opener (d) a ramp
22. 22.⚙️ Which of these is an inclined plane? (a) a slide (b) a crane (c) a flagpole (d) a bottle opener
23. 23.⚖️ 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
24. 24.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
25. 25.True or false: a slide is an inclined plane. (a) True (b) False
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a mirror (c) a flat table (d) a 30 cm ruler
27. 27.⚙️ Which simple machine is a doorknob? (a) a pulley (b) a wheel and axle (c) a lever (d) an inclined plane
28. 28.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a 30 cm ruler (d) coins of one kind
29. 29.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
30. 30.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) zero (d) equal on both sides
31. 31.True or false: a spoon lifting a lid is an inclined plane. (a) False (b) True
32. 32.🧺 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) a balloon
33. 33.True or false: a flat table is needed for the ruler lever. (a) False (b) True
34. 34.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
35. 35.🧺 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 battery cell (d) coins of one kind
36. 36.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
39. 39.🧺 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 magnet (d) a flat table
40. 40.⚖️ 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) the kind of coins (c) where the pencil is (d) distance from the pencil

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