The drawings show three charges that have the same magnitude but may have differ

Question

The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between the charges is the same. The magnitude of the charges is |q|= 3.2 C, and the distance between them is d = 0.7 mm. Determine the magnitude of the net force on charge 2 for each of the three drawings. I just need help with the third drawing it is is the shape of a ninety degree angle with q1 a positive q2 which is where the ninety degree angle is - negative and q3 positive

Explanation / Answer

q1=3.2 uC-------------------------q2=-3.2uC

|

|

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q3=3.2uC

Here F21=F21x ,F23=F23y

Net Force acting on Q2 is

FNet=sqrt[F212+F232] =sqrt[(KQ1Q2/d2)2+(KQ2Q3/d2)2]

FNet=sqrt[2*(9*109)*(3.2*10-6)2/(0.7*10-3)2]

FNet=613.32 N

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