Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 139 · 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: yeast is not needed for the ruler lever. (a) False (b) True
2. 2.True or false: a balloon is needed for the ruler lever. (a) True (b) False
3. 3.⚖️ 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 number of coins (b) which side goes down (c) distance from the pencil
4. 4.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a flat table (c) a battery cell (d) a balloon
5. 5.⚙️ Which of these is a lever? (a) a bottle opener (b) a steering wheel (c) a slide (d) a flagpole
6. 6.True or false: a round pencil is needed for the ruler lever. (a) False (b) True
7. 7.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the spoon is magnetic (c) a lever boosts your push (d) the lid gets softer
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) yeast (c) a flat table (d) a 30 cm ruler
9. 9.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) a 30 cm ruler (c) a flat table (d) a round pencil
10. 10.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
11. 11.⚙️ Which of these is a lever? (a) a crane (b) a spoon lifting a lid (c) a sloping road (d) a well pulley
12. 12.⚖️ 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 measure it (c) we keep it the same
13. 13.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit farther from middle (c) sit on the middle (d) sit closer to middle
14. 14.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
15. 15.⚖️ 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) False (b) True
16. 16.⚖️ 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) distance from the pencil (b) which side goes down (c) the same ruler (d) the number of coins
17. 17.⚖️ 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
18. 18.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the left side (c) the right side (d) both go up
19. 19.⚖️ 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) which side goes down (c) distance from the pencil (d) the kind of coins
20. 20.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a crowbar (c) a ramp (d) a see-saw
21. 21.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) bend it till it snaps (c) stand on the ruler (d) press it gently
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) a balloon (c) coins of one kind (d) a round pencil
24. 24.⚙️ Which simple machine is a steering wheel? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
25. 25.True or false: a see-saw is a lever. (a) True (b) False
26. 26.⚖️ 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
27. 27.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 5 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
29. 29.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) impossible (c) easier (d) harder
30. 30.True or false: a well pulley uses a pulley. (a) False (b) True
31. 31.⚖️ 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
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) True (b) False
33. 33.🧺 Which of these is not needed for the ruler lever? (a) a mirror (b) a round pencil (c) a flat table (d) a 30 cm ruler
34. 34.True or false: a bottle opener is a wheel and axle. (a) False (b) True
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 5 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
36. 36.True or false: a spoon lifting a lid is a wheel and axle. (a) False (b) True
37. 37.⚙️ Which of these is a wheel and axle? (a) a crane (b) a see-saw (c) a slide (d) a doorknob
38. 38.🧺 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 mirror (d) a 30 cm ruler
39. 39.🛟 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
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) a round pencil (c) coins of one kind (d) a 30 cm ruler

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