Two charges repel each other with a force 10^-8N when they are 6cm apart.when the charges are 2cm apart,the force between them is
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Answer:
F = kq1q2/r²
10^-8 = 9×10^9q1q2/(6×10^-2)²
q1q2=10^-8 × 36×10^-4 / 9×10^9
=4×10^-21 C
F' = 9×10^9 × 4×10^-21 / (2×10^-2)²
= 9×10^-16 N
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