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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 #?

Answer 1

Julia Aguilar

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

#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#

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Answer 2

Charles Aeschliman

The net force on a charge of 3 C at position 1 is 6 N toward the charge of 4 C.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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