X- points away from the charge
y- points in the direction of the force on the positive charge
z- points toward the charge
According to Newton's 2nd law of motion:
F = m * a where F is the force applied in Newtons, m is the mass of the object in kg, and a is the acceleration of the object in m/

.
Therefore the force applied in this situation is simply:
F = 6 kg * 2.3 m/

= 13.8 N
Hope this helps!
I believe it is A. positive acceleration since it is speeding up
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