Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 715 · 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.True or false: a balloon is needed for the ruler lever. (a) True (b) False
2. 2.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
3. 3.⚙️ Which simple machine is a spoon lifting a lid? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
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 kept the same. (a) False (b) True
5. 5.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
6. 6.⚙️ Which of these uses a pulley? (a) a crane (b) a spoon lifting a lid (c) a sloping road (d) a bottle opener
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) False (b) True
8. 8.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) bigger on the left (c) equal on both sides (d) zero
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a flat table (c) a balloon (d) coins of one kind
10. 10.🔮 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
11. 11.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
12. 12.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) impossible (c) the same (d) harder
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.True or false: coins of one kind is not needed for the ruler lever. (a) True (b) False
15. 15.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a balloon (c) turmeric powder (d) a 30 cm ruler
16. 16.True or false: a balloon is not needed for the ruler lever. (a) True (b) False
17. 17.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a battery cell (c) coins of one kind (d) yeast
18. 18.⚖️ 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
19. 19.🧺 Which of these is needed for the ruler lever? (a) a round pencil (b) a magnet (c) a battery cell (d) yeast
20. 20.True or false: a sloping road uses a pulley. (a) True (b) False
21. 21.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) the spoon is hot (c) the lid gets softer (d) a lever boosts your push
22. 22.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
23. 23.⚖️ 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 change it (c) we keep it the same
24. 24.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) stand on the ruler (c) press it gently (d) bend it till it snaps
25. 25.⚖️ 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 kind of coins (b) distance from the pencil (c) which side goes down (d) the number of coins
26. 26.True or false: a sloping road is a wheel and axle. (a) False (b) True
27. 27.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a tap handle (c) a ramp (d) a well pulley
28. 28.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
29. 29.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
30. 30.⚖️ 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
31. 31.⚙️ Which simple machine is a flagpole? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a flat table (c) yeast (d) a 30 cm ruler
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) coins of one kind (d) a balloon
34. 34.⚖️ What is the turning point of a lever called? (a) the axle (b) the effort (c) the load (d) the fulcrum
35. 35.🧺 Do we need a 30 cm ruler for the ruler lever? (a) needed (b) not needed
36. 36.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
37. 37.True or false: yeast is needed for the ruler lever. (a) True (b) False
38. 38.⚖️ 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
39. 39.⚙️ Which of these uses a pulley? (a) a ramp (b) a bottle opener (c) a flagpole (d) a sloping road
40. 40.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed

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