Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 329 · 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) a round pencil (b) a 30 cm ruler (c) coins of one kind (d) a battery cell
2. 2.True or false: a tap handle is a wheel and axle. (a) False (b) True
3. 3.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the fulcrum (d) the axle
4. 4.⚖️ 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) where the pencil is (b) the same ruler (c) the number of coins (d) distance from the pencil
5. 5.True or false: turmeric powder is not needed for the ruler lever. (a) False (b) True
6. 6.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a round pencil (d) a balloon
7. 7.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a flat table (c) a magnet (d) a mirror
8. 8.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
9. 9.True or false: a spoon lifting a lid is a lever. (a) False (b) True
10. 10.⚖️ 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
11. 11.True or false: a sloping road is an inclined plane. (a) True (b) False
12. 12.⚙️ Which simple machine is a tap handle? (a) a pulley (b) an inclined plane (c) a lever (d) a wheel and axle
13. 13.⚖️ A ruler balances on a pencil at its middle. You place 3 coins 6 cm to the left of the pencil. How many coins must you place 6 cm to the right to balance it?
14. 14.⚙️ Which simple machine is a steering wheel? (a) an inclined plane (b) a wheel and axle (c) a lever (d) a pulley
15. 15.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
16. 16.⚖️ 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 keep it the same (c) we change it
17. 17.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) coins of one kind (c) turmeric powder (d) a magnet
18. 18.⚖️ Coins on the two sides balance when coins × distance is ___. (a) bigger on the left (b) zero (c) always 10 (d) equal on both sides
19. 19.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) where the pencil is (b) which side goes down (c) distance from the pencil
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) turmeric powder (b) coins of one kind (c) a round pencil (d) a flat table
21. 21.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) sit on the middle (c) sit closer to middle (d) jump up and down
22. 22.True or false: yeast is needed for the ruler lever. (a) True (b) False
23. 23.🛟 What is a safe way to use a ruler as a lever? (a) press it gently (b) stand on the ruler (c) flick coins at faces (d) bend it till it snaps
24. 24.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 4 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
25. 25.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 8 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
26. 26.⚙️ Which of these uses a pulley? (a) a crowbar (b) a flagpole (c) a slide (d) a sloping road
27. 27.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a round pencil
28. 28.True or false: a see-saw is a lever. (a) False (b) True
29. 29.⚙️ Which of these uses a pulley? (a) a slide (b) a tap handle (c) a well pulley (d) a crowbar
30. 30.True or false: a slide is a lever. (a) True (b) False
31. 31.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 6 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
32. 32.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed
33. 33.True or false: a slide is a wheel and axle. (a) False (b) True
34. 34.True or false: a flagpole uses a pulley. (a) True (b) False
35. 35.🧺 Which of these is needed for the ruler lever? (a) a 30 cm ruler (b) a magnet (c) turmeric powder (d) a battery cell
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) coins of one kind (c) a flat table (d) yeast
37. 37.🧺 Which of these is not needed for the ruler lever? (a) a magnet (b) coins of one kind (c) a 30 cm ruler (d) a flat table
38. 38.True or false: a well pulley uses a pulley. (a) True (b) False
39. 39.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 2 cm to the left of the pencil and 1 coin on the right. How many cm from the pencil must the right-hand coins go to balance it?
40. 40.⚖️ 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) False (b) True

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