Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 74 · 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 magnet for the ruler lever? (a) not needed (b) needed
2. 2.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) jump up and down (d) sit closer to middle
3. 3.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
4. 4.True or false: a spoon lifting a lid is a lever. (a) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) coins of one kind (b) a balloon (c) yeast (d) a battery cell
6. 6.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.True or false: turmeric powder is needed for the ruler lever. (a) True (b) False
9. 9.True or false: a well pulley is an inclined plane. (a) True (b) False
10. 10.🧺 Do we need a flat table for the ruler lever? (a) not needed (b) needed
11. 11.🛟 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
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a magnet (c) a round pencil (d) coins of one kind
13. 13.True or false: a magnet is not needed for the ruler lever. (a) False (b) True
14. 14.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the same ruler (b) which side goes down (c) distance from the pencil
15. 15.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a round pencil (d) a balloon
16. 16.⚙️ Which of these is a lever? (a) a sloping road (b) a steering wheel (c) a spoon lifting a lid (d) a flagpole
17. 17.🧺 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 battery cell
18. 18.⚙️ Which of these is an inclined plane? (a) a well pulley (b) a doorknob (c) a crowbar (d) a sloping road
19. 19.True or false: a crowbar uses a pulley. (a) False (b) True
20. 20.⚙️ Which of these uses a pulley? (a) a flagpole (b) a steering wheel (c) a bottle opener (d) a crowbar
21. 21.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) a flat table (c) a 30 cm ruler (d) coins of one kind
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the ruler lever? (a) yeast (b) a 30 cm ruler (c) a mirror (d) a balloon
24. 24.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) the same (d) easier
25. 25.🧺 Do we need turmeric powder for the ruler lever? (a) not needed (b) needed
26. 26.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
27. 27.⚙️ Which of these is a lever? (a) a crane (b) a see-saw (c) a flagpole (d) a doorknob
28. 28.True or false: a slide is an inclined plane. (a) False (b) True
29. 29.⚖️ 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
30. 30.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 2 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
31. 31.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a flat table (c) yeast (d) turmeric powder
32. 32.⚖️ 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
33. 33.True or false: a flat table is needed for the ruler lever. (a) True (b) False
34. 34.⚖️ 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) which side goes down (c) where the pencil is (d) distance from the pencil
35. 35.🧺 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) a battery cell
36. 36.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: where the pencil is is what we measure. (a) False (b) True
37. 37.True or false: a flagpole uses a pulley. (a) True (b) False
38. 38.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
39. 39.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
40. 40.⚖️ 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 keep it the same (b) we measure it (c) we change it

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