Question

Now we will consider a two-dimensional arrangement of charges. A point charge q1=2.0μC is located on the positive y axis at y=0.30m, and an identical charge q2 is at the origin. Find the magnitude and direction of the total force that these two charges exert on a third charge q3=4.0μC that is on the positive x axis at x=0.40m.

A) In the same example, what is the magnitude of the net force on q3 if q1=2.0μC, as in the example, but q2=-2.0μC? Express your answer in newtons to two significant figures.

B) In the same example, what is the direction of the force on q3 if q1=2.0μC, as in the example, but q2=-2.0μC? Express your answer in degrees below the -x axis as an integer.

Answer 1

Given

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Since F₁ is acting at an angle ,we have to split it into its components

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(-ve sign shows that force is acting downwards)

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Magnitude

ANSWER:

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Direction

ANSWER:

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if   is negative is acting in opposite direction( is negative)

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A) .Magnitude

ANSWER:

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B). Direction

ANSWER: below -ve x axis, counter clockwise(218.20 deg from +ve x axis)

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