A particle of mass 70 g and charge 69x10⁻⁶ C is released from rest when it is 69 cm from a second particle of charge -22x10⁻⁶ C. Determine the magnitude of the initial acceleration of the 70 g particle.
a) 9.81 m/s²
b) 3.56 m/s²
c) 8.22 m/s²
d) 6.44 m/s²