A 70-μC Charge Is Placed at the Origin and a Second

Multiple Choice

A 7.0-μC charge is placed at the origin and a second charge is placed on the x-axis at x = 0.3 m.If the resulting force on the second charge is 6.9 N in the positive x-direction,what is the force on the charge at the origin?​

A) 6.9 N in the positive x-direction
B) 6.9 N in the negative x-direction
C) 0 N
D) not able to be determined until the second charge is known
E) ​6.9 N in the negative y-direction