Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 773 · 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) the right side (b) the left side (c) neither, it balances (d) both go up
2. 2.⚙️ Which of these is a wheel and axle? (a) a slide (b) a tap handle (c) a flagpole (d) a bottle opener
3. 3.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
4. 4.⚙️ Which simple machine is a flagpole? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
5. 5.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
6. 6.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the kind of coins is kept the same. (a) False (b) True
7. 7.⚖️ 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
8. 8.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a 30 cm ruler (c) yeast (d) a round pencil
10. 10.⚖️ 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 number of coins (c) distance from the pencil (d) which side goes down
11. 11.⚙️ Which simple machine is a spoon lifting a lid? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
12. 12.True or false: yeast is needed for the ruler lever. (a) True (b) False
13. 13.🧺 Do we need a balloon for the ruler lever? (a) not needed (b) needed
14. 14.⚙️ Which of these is a lever? (a) a crowbar (b) a flagpole (c) a slide (d) a sloping road
15. 15.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) flick coins at faces (c) press it gently (d) bend it till it snaps
16. 16.True or false: a balloon is needed for the ruler lever. (a) True (b) False
17. 17.🧺 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 magnet (d) coins of one kind
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) turmeric powder
19. 19.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a round pencil (b) a 30 cm ruler (c) a flat table (d) a mirror
20. 20.⚙️ Which simple machine is a see-saw? (a) a pulley (b) an inclined plane (c) a wheel and axle (d) a lever
21. 21.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a battery cell (c) a mirror (d) a flat table
22. 22.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a balloon (c) a 30 cm ruler (d) a flat table
23. 23.⚙️ Which of these uses a pulley? (a) a spoon lifting a lid (b) a flagpole (c) a doorknob (d) a tap handle
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
28. 28.⚙️ Which of these is a lever? (a) a slide (b) a well pulley (c) a sloping road (d) a see-saw
29. 29.⚖️ 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?
30. 30.⚖️ 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 measure it (b) we change it (c) we keep it the same
31. 31.⚙️ Which of these is an inclined plane? (a) a crane (b) a ramp (c) a flagpole (d) a crowbar
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
33. 33.True or false: a doorknob uses a pulley. (a) True (b) False
34. 34.⚖️ 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?
35. 35.🧺 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) coins of one kind
36. 36.⚖️ On a see-saw, how can a light child balance a heavier child? (a) jump up and down (b) sit closer to middle (c) sit on the middle (d) sit farther from middle
37. 37.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is kept the same. (a) True (b) False
38. 38.⚖️ 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 keep it the same (b) we measure it (c) we change it
39. 39.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) yeast (c) a round pencil (d) a 30 cm ruler
40. 40.🧺 Do we need a round pencil for the ruler lever? (a) needed (b) not needed

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