A Particle (Charge = Q)is Kept in a Fixed Position

Multiple Choice

A particle (charge = Q) is kept in a fixed position at point P,and a second particle (charge = q) is released from rest when it is a distance R from P.If Q = +2.0 mC,q = -1.5 mC,and R = 30 cm,what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?

A) 60 kJ
B) 45 kJ
C) 75 kJ
D) 90 kJ
E) 230 kJ