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Dean
Dean asked in Science & MathematicsMathematics · 4 years ago

Help? I have no idea how to answer this pre-calculus question.?

According to Coulomb's law, the force F of attraction between positive and negative point charges is inversely proportional to the square of the distance x between them.

According to Coulomb's law, the force F of attraction between positive and negative point charges is inversely proportional to the square of the distance x between them.

(a) Assuming that the force of attraction between two point charges is 0.0005 newton when the distance between them is 0.3 meter, find the constant of proportionality (with proper units).

(b) Find the force of attraction between the point charges when they are 3 meters apart. Give the absolute value of the force rounded to 7 decimal places.

2 Answers

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  • ted s
    Lv 7
    4 years ago

    F = k / ( x_2 - x_1)²----> 0.0005 = k / ( 0.3)²...solve for k......

    and F = k / ( 3)²....where k is what YOU computed in the 1st part

  • alex
    Lv 7
    4 years ago

    a/

    F=k/d^2 --->k = 4.5 * 10^-5

    b/

    0.000005 N

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