Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 583 · 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? Which of these is the one thing we change? (a) the kind of coins (b) the same ruler (c) distance from the pencil (d) which side goes down
2. 2.⚖️ 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
3. 3.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
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) which side goes down (b) the kind of coins (c) distance from the pencil
5. 5.True or false: coins of one kind is needed for the ruler lever. (a) False (b) True
6. 6.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
7. 7.⚖️ 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
8. 8.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a 30 cm ruler (d) a mirror
9. 9.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) impossible (b) easier (c) the same (d) harder
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a round pencil (d) a 30 cm ruler
11. 11.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a 30 cm ruler (d) coins of one kind
12. 12.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they are too cold (c) they are too shiny (d) they may swallow them
13. 13.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a flat table (c) coins of one kind (d) a 30 cm ruler
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
15. 15.True or false: a steering wheel is a lever. (a) True (b) False
16. 16.⚖️ 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
17. 17.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
18. 18.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a round pencil (c) a battery cell (d) yeast
19. 19.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a battery cell (c) a flat table (d) a mirror
20. 20.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a mirror (c) a flat table (d) coins of one kind
21. 21.⚖️ What is the turning point of a lever called? (a) the fulcrum (b) the load (c) the axle (d) the effort
22. 22.True or false: a 30 cm ruler is not needed for the ruler lever. (a) False (b) True
23. 23.⚖️ 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 measure it (c) we keep it the same
24. 24.⚙️ Which simple machine is a ramp? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
25. 25.True or false: a crane is a lever. (a) True (b) False
26. 26.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
27. 27.True or false: a crane uses a pulley. (a) True (b) False
28. 28.⚖️ 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?
29. 29.⚖️ 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
30. 30.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a round pencil (c) a balloon (d) a 30 cm ruler
31. 31.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True
32. 32.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) the right side (c) neither, it balances (d) the left side
33. 33.⚖️ 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
34. 34.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a doorknob (c) a bottle opener (d) a flagpole
35. 35.True or false: a doorknob is a wheel and axle. (a) False (b) True
36. 36.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
37. 37.⚙️ Which of these uses a pulley? (a) a ramp (b) a well pulley (c) a bottle opener (d) a crowbar
38. 38.⚙️ Which simple machine is a crowbar? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
39. 39.⚖️ 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
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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