Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 839 · 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 30 cm ruler for the ruler lever? (a) needed (b) not needed
2. 2.True or false: a slide is an inclined plane. (a) True (b) False
3. 3.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
4. 4.🧺 Do we need a balloon for the ruler lever? (a) needed (b) not needed
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) the kind of coins (b) distance from the pencil (c) the number of coins (d) where the pencil is
6. 6.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
7. 7.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a flat table (d) a balloon
8. 8.True or false: a mirror is not needed for the ruler lever. (a) False (b) True
9. 9.True or false: a see-saw is a wheel and axle. (a) True (b) False
10. 10.⚙️ Which of these uses a pulley? (a) a ramp (b) a steering wheel (c) a well pulley (d) a tap handle
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is what we measure. (a) False (b) True
12. 12.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit on the middle (c) jump up and down (d) sit farther from middle
13. 13.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a well pulley (c) a flagpole (d) a slide
14. 14.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a flat table (c) coins of one kind (d) a battery cell
15. 15.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) easier (c) impossible (d) harder
16. 16.⚖️ 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
17. 17.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
18. 18.True or false: a bottle opener is a lever. (a) False (b) True
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) the left side (b) both go up (c) the right side (d) neither, it balances
20. 20.⚖️ 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
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a magnet (d) a 30 cm ruler
22. 22.True or false: a sloping road is a lever. (a) True (b) False
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) False (b) True
24. 24.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a round pencil (c) a 30 cm ruler (d) yeast
25. 25.⚖️ 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) where the pencil is (c) which side goes down
26. 26.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
27. 27.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
28. 28.⚖️ 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 measure it (b) we change 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 what we measure? (a) where the pencil is (b) distance from the pencil (c) which side goes down (d) the number of coins
30. 30.True or false: a flat table is needed for the ruler lever. (a) True (b) False
31. 31.⚙️ Which of these is an inclined plane? (a) a crowbar (b) a steering wheel (c) a ramp (d) a doorknob
32. 32.⚙️ Which simple machine is a crowbar? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
33. 33.⚙️ Which simple machine is a spoon lifting a lid? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
34. 34.⚖️ 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
35. 35.⚙️ Which simple machine is a doorknob? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
36. 36.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
37. 37.True or false: a round pencil is needed for the ruler lever. (a) True (b) False
38. 38.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
39. 39.⚙️ Which of these is a wheel and axle? (a) a doorknob (b) a flagpole (c) a ramp (d) a bottle opener
40. 40.True or false: a balloon is not needed for the ruler lever. (a) True (b) False

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