Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 431 · 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.⚙️ Which simple machine is a steering wheel? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
2. 2.True or false: a round pencil is not needed for the ruler lever. (a) False (b) True
3. 3.⚖️ 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
4. 4.True or false: a battery cell is not needed for the ruler lever. (a) True (b) False
5. 5.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) yeast (c) a battery cell (d) a round pencil
6. 6.⚖️ 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
7. 7.True or false: a flat table is needed for the ruler lever. (a) False (b) True
8. 8.⚙️ Which simple machine is a well pulley? (a) a lever (b) an inclined plane (c) a pulley (d) a wheel and axle
9. 9.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 1 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?
10. 10.True or false: a magnet is needed for the ruler lever. (a) False (b) True
11. 11.True or false: a 30 cm ruler is needed for the ruler lever. (a) True (b) False
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 keep it the same (c) we measure it
13. 13.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a balloon (c) turmeric powder (d) a mirror
14. 14.⚙️ Which of these is a lever? (a) a see-saw (b) a ramp (c) a tap handle (d) a flagpole
15. 15.⚖️ 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) distance from the pencil (c) which side goes down
16. 16.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
17. 17.⚙️ Which of these is a wheel and axle? (a) a slide (b) a doorknob (c) a well pulley (d) a flagpole
18. 18.⚖️ 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 kind of coins
19. 19.🛟 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
20. 20.True or false: a bottle opener is a lever. (a) False (b) True
21. 21.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
22. 22.⚖️ 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) distance from the pencil (c) the number of coins (d) the kind of coins
23. 23.⚙️ Which of these is an inclined plane? (a) a steering wheel (b) a well pulley (c) a ramp (d) a spoon lifting a lid
24. 24.⚖️ 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) True (b) False
25. 25.True or false: a spoon lifting a lid is a wheel and axle. (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 measure it (c) we change it
27. 27.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is the one thing we change. (a) False (b) True
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 8 cm to the left of the pencil and 4 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
29. 29.⚙️ Which of these is a lever? (a) a slide (b) a crowbar (c) a steering wheel (d) a well pulley
30. 30.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) a 30 cm ruler (c) a mirror (d) a round pencil
31. 31.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) a round pencil (c) a 30 cm ruler (d) a flat table
32. 32.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) a magnet (d) a flat table
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 battery cell
34. 34.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit farther from middle (b) jump up and down (c) sit closer to middle (d) sit on the middle
35. 35.⚖️ 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
36. 36.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) turmeric powder (c) a 30 cm ruler (d) yeast
37. 37.True or false: a balloon is needed for the ruler lever. (a) True (b) False
38. 38.🧺 Do we need a magnet for the ruler lever? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) a flat table (c) a round pencil (d) a 30 cm ruler
40. 40.True or false: a see-saw is a lever. (a) False (b) True

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