Two charges of $-4 C$ and $-2 C$ are positioned on a line at points $-1$ and $14$ , respectively. What is the net force on a charge of $-2 C$ at $1$ ?

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Answer 1 · 2016-05-01T13:38:14

$"The magnitude of the net force " |F|=1,779*10^10 " N"$

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$F_A=(k*(-4)*(-2))/2^2=(8k)/4=2k$

$F_B=(k*(-2)*(-2))/13^2=(4k)/169$

$F_A > F_B$

$F_"net"=F_A-F_B$

$F_"net"=2k-(4k)/169$

$F_"net"=(338k-4k)/169$

$F_"net"=(334k)/169$

$k=9*10^9 N*m^2*C^-2$

$F_"net"=(334*9*10^9)/169$

$F_"net"=17,79*10^9$

$F_"net"=1,779*10^10 " N"$

Two charges of -4 C -4 C and -2 C -2 C are positioned on a line at points -1 -1 and 14 14 , respectively. What is the net force on a charge of -2 C -2 C at 1 1 ?