Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 488 · 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.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) both go up (b) neither, it balances (c) the right side (d) the left side
2. 2.⚙️ Which of these is a wheel and axle? (a) a crane (b) a doorknob (c) a flagpole (d) a spoon lifting a lid
3. 3.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) flick coins at faces (c) stand on the ruler (d) press it gently
4. 4.⚖️ A ruler balances on a pencil at its middle. You place 4 coins 6 cm to the left of the pencil. How many coins must you place 8 cm to the right to balance it?
5. 5.⚙️ Which of these is an inclined plane? (a) a sloping road (b) a see-saw (c) a spoon lifting a lid (d) a crane
6. 6.True or false: a steering wheel is a wheel and axle. (a) False (b) True
7. 7.⚙️ Which simple machine is a ramp? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
8. 8.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a slide (d) a bottle opener
9. 9.⚖️ 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) distance from the pencil (c) the number of coins
10. 10.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a 30 cm ruler (b) yeast (c) a flat table (d) coins of one kind
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is what we measure? (a) distance from the pencil (b) the kind of coins (c) the same ruler (d) which side goes down
12. 12.⚖️ 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
13. 13.True or false: a well pulley uses a pulley. (a) True (b) False
14. 14.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
15. 15.True or false: a spoon lifting a lid uses a pulley. (a) True (b) False
16. 16.⚙️ Which of these uses a pulley? (a) a crane (b) a crowbar (c) a bottle opener (d) a ramp
17. 17.True or false: a bottle opener is a lever. (a) False (b) True
18. 18.⚙️ Which simple machine is a sloping road? (a) a lever (b) an inclined plane (c) a wheel and axle (d) a pulley
19. 19.🧺 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 round pencil (d) a magnet
20. 20.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) coins of one kind
21. 21.⚖️ 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
22. 22.True or false: a balloon is not needed for the ruler lever. (a) False (b) True
23. 23.🧺 Do we need yeast for the ruler lever? (a) needed (b) not needed
24. 24.True or false: a tap handle is a wheel and axle. (a) False (b) True
25. 25.True or false: a battery cell is not needed for the ruler lever. (a) False (b) True
26. 26.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the number of coins is the one thing we change. (a) True (b) False
27. 27.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) a balloon (d) a round pencil
28. 28.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 1 cm to the left of the pencil. How many coins must you place 1 cm to the right to balance it?
29. 29.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is the one thing we change. (a) False (b) True
30. 30.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
31. 31.⚖️ 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
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 the one thing we change. (a) True (b) False
33. 33.🧺 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 30 cm ruler (d) a battery cell
34. 34.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
35. 35.⚖️ A ruler balances on a pencil at its middle. You place 2 coins 12 cm to the left of the pencil. How many coins must you place 4 cm to the right to balance it?
36. 36.⚙️ Which of these is a lever? (a) a steering wheel (b) a crowbar (c) a doorknob (d) a slide
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.🧺 Which of these is needed for the ruler lever? (a) a balloon (b) a 30 cm ruler (c) a magnet (d) a battery cell
39. 39.⚙️ Which of these is a lever? (a) a well pulley (b) a steering wheel (c) a ramp (d) a bottle opener
40. 40.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is the one thing we change. (a) True (b) False

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