W15 Activity 2 - Coulomb's Law Practice

W15 Activity 2 Coulomb's Law Practice

By Nicholas Carrillo

​Some text here about the topic of discussion.

​Coulomb's Law describes the force between two charges.

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The magnitude of the force is based on the charges, and the distance between them.

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If q1 = -3C, q2 = 5C,​ and the distance between them is 1m, what is the magnitude of the force between them?

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​ke = 9x10⁹ Nm²/C²

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F = k​e |-3*5|/(1)²

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​F = k​e |-15|

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F = (9x10​⁹)*15

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F = 135 x 10⁹ N​

Fill in the Blank

Work with a partner to determine the amount of force between a -5C charge and a 2C charge separated a distance of 1m.

Answer Units: [10⁹ N]

If the answer is 50 x 10⁹ N, then you would input 50 as your answer.

​Let's try another.

If q1 = 2C and q2 = 3C, and the distance between them is 0.5m, what is the magnitude of the force between them?

​ke = 9x10⁹ Nm²/C²

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F = k​e |3*2|/(0.5)²

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​F = k​e |6|/0.25

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F = (9x10​⁹)*6/.25

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F = 54 x 10⁹/0.25 ​

​F = 216 x 10⁹ N​

Fill in the Blank

Work with a partner to determine the amount of force between a 2C charge and another 1C charge separated a distance of 0.5m.

Answer Units: [10⁹ N]

If the answer is 50 x 10⁹ N, then you would input 50 as your answer.

Now we want to look at how the distance affects the force.

How much does the force decrease if we double the distance between the charges?

Let's say the force when the two charges are 3m apart is F₁, and the force when they are 6m apart is F₂.

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What is the final force, F₂,compared to inital force, F₁?

Fill in the Blank

The distance between two charges increases from 2m to 4m, what is the final force compared to the initial force?

Input your answer as either a fraction or decimal.

Fill in the Blank

The distance between two charges decreases from 4m to 2m, what is final force compared to the initial force?

Fill in the Blank

The distance between two charges increases from 3m to 5m. What is the final force compared to the initial force?

Input your answer as a decimal