Lever Experiment Worksheet

Science experiments lesson 24: Lever with a ruler and coins · Set 912 · 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.⚖️ 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 number of coins (c) distance from the pencil
2. 2.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a balloon (b) coins of one kind (c) a round pencil (d) a 30 cm ruler
3. 3.⚖️ 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 4 cm to the right to balance it?
4. 4.🧺 Do we need a round pencil for the ruler lever? (a) not needed (b) needed
5. 5.True or false: a slide is an inclined plane. (a) True (b) False
6. 6.⚖️ A ruler balances on a pencil at its middle. You place 6 coins 6 cm to the left of the pencil. How many coins must you place 12 cm to the right to balance it?
7. 7.True or false: a sloping road is an inclined plane. (a) True (b) False
8. 8.🔮 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
9. 9.⚙️ Which of these is a lever? (a) a see-saw (b) a sloping road (c) a crane (d) a ramp
10. 10.⚙️ Which simple machine is a slide? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
11. 11.🧺 Which of these is not needed for the ruler lever? (a) coins of one kind (b) a balloon (c) a flat table (d) a round pencil
12. 12.⚖️ A ruler balances on a pencil at its middle. You place 5 coins 2 cm to the left of the pencil and 2 coins on the right. How many cm from the pencil must the right-hand coins go to balance it?
13. 13.🧺 Which of these is not needed for the ruler lever? (a) yeast (b) a round pencil (c) a 30 cm ruler (d) a flat table
14. 14.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
15. 15.⚖️ 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 4 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 “where the pencil is”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) equal on both sides (d) bigger on the left
18. 18.🧺 Do we need a 30 cm ruler for the ruler lever? (a) not needed (b) needed
19. 19.True or false: yeast is needed for the ruler lever. (a) True (b) False
20. 20.🧺 Which of these is needed for the ruler lever? (a) a magnet (b) a round pencil (c) a battery cell (d) turmeric powder
21. 21.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) easier (b) the same (c) impossible (d) harder
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) the number of coins (b) the same ruler (c) distance from the pencil (d) which side goes down
23. 23.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
24. 24.True or false: a crowbar uses a pulley. (a) False (b) True
25. 25.⚙️ Which of these is a lever? (a) a crane (b) a flagpole (c) a bottle opener (d) a slide
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 measure it (c) we change it
27. 27.🧺 Which of these is needed for the ruler lever? (a) a mirror (b) a battery cell (c) a flat table (d) turmeric powder
28. 28.⚙️ Which of these is an inclined plane? (a) a slide (b) a crane (c) a tap handle (d) a steering wheel
29. 29.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) coins of one kind (c) a flat table (d) a magnet
32. 32.🧺 Do we need a battery cell for the ruler lever? (a) not needed (b) needed
33. 33.🛟 Why should coins be kept away from very small children? (a) they are magnetic (b) they may swallow them (c) they are too shiny (d) they are too cold
34. 34.🧺 Which of these is needed for the ruler lever? (a) turmeric powder (b) a mirror (c) coins of one kind (d) a battery cell
35. 35.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a lever (d) a pulley
36. 36.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a magnet (c) a 30 cm ruler (d) a flat table
37. 37.⚙️ Which of these is a wheel and axle? (a) a steering wheel (b) a bottle opener (c) a spoon lifting a lid (d) a ramp
38. 38.⚖️ On a see-saw, how can a light child balance a heavier child? (a) sit closer to middle (b) sit farther from middle (c) sit on the middle (d) jump up and down
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a flat table (b) a round pencil (c) coins of one kind (d) turmeric powder
40. 40.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed

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