Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 643 · 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.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) yeast (c) a 30 cm ruler (d) a round pencil
2. 2.🧺 Which of these is not needed for the ruler lever? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
3. 3.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a 30 cm ruler (c) a magnet (d) turmeric powder
4. 4.True or false: a bottle opener is an inclined plane. (a) True (b) False
5. 5.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
6. 6.True or false: a magnet is not needed for the ruler lever. (a) True (b) False
7. 7.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil and 6 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
8. 8.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a round pencil (c) a 30 cm ruler (d) turmeric powder
9. 9.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a magnet (c) coins of one kind (d) a 30 cm ruler
10. 10.⚙️ Which of these is a wheel and axle? (a) a ramp (b) a crane (c) a doorknob (d) a bottle opener
11. 11.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) always 10 (c) equal on both sides (d) zero
12. 12.⚖️ 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
13. 13.⚖️ 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 change it (b) we measure it (c) we keep it the same
14. 14.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) harder (b) impossible (c) easier (d) the same
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.⚖️ 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) True (b) False
17. 17.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a doorknob (d) a flagpole
18. 18.True or false: turmeric powder is not needed for the ruler lever. (a) True (b) False
19. 19.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 3 cm to the left of the pencil. How many coins must you place 5 cm to the right to balance it?
20. 20.⚙️ Which simple machine is a crane? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
21. 21.⚖️ 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) the lid gets softer (d) a lever boosts your push
22. 22.True or false: a doorknob is a lever. (a) False (b) True
23. 23.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 12 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
24. 24.⚙️ Which simple machine is a ramp? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
25. 25.True or false: a sloping road is an inclined plane. (a) False (b) True
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) bend it till it snaps (d) flick coins at faces
28. 28.⚖️ 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
29. 29.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
30. 30.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a magnet (d) coins of one kind
31. 31.True or false: a crowbar is a lever. (a) True (b) False
32. 32.⚖️ 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
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.True or false: a bottle opener is a lever. (a) False (b) True
35. 35.⚖️ 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 same ruler (c) distance from the pencil
36. 36.True or false: a doorknob uses a pulley. (a) False (b) True
37. 37.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 1 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
38. 38.True or false: a flat table is needed for the ruler lever. (a) False (b) True
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 kept the same. (a) True (b) False
40. 40.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) coins of one kind (c) a battery cell (d) a 30 cm ruler

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