solve it Fnet=F2-F1 if F2 is kqQ/(L-X)2(squre) and F1 is kqQ/(L+X)2 (square)
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Fnet = KqQ/( L -x )² - KqQ/( L+x)²
=KqQ { 1/(L-x)² -1/(L+x )² }
=KqQ{ (L² +x² +2Lx-L² -x² +2Lx)/(L-x)²(L+x)² }
=4KqQx /(L²-x²)(L²-x²)
=4KqQx/(L² -x²)²
=KqQ { 1/(L-x)² -1/(L+x )² }
=KqQ{ (L² +x² +2Lx-L² -x² +2Lx)/(L-x)²(L+x)² }
=4KqQx /(L²-x²)(L²-x²)
=4KqQx/(L² -x²)²
manu009:
dude pls explain how u get that pls
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