Two charges of # 2 C # and # 4 C# are positioned on a line at points # -3 # and # -2 #, respectively. What is the net force on a charge of # 3 C# at # 1 #?

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Answer 1 · 2016-04-28T18:34:40

#F=15,38*10^9N#

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#F_A=k(q_A*q_C)/4^2#

#F_B=k(q_B*q_C)/3^2#

#F=F_A+F_B#

#F=k((q_A*q_C)/16+(q_B*q_C)/9)#

#F=9*10^9((2*3)/16+(4*3)/9)#

#F=9*10^9(6/16+12/9)#

#F=9*10^9((54+192))/144#

#F=9*10^9*(246)/144#

#F=15,38*10^9N#