An electron (m=9.1×10−31kg,q=−1.6×10−19C) is released from rest in a uniform upward electric field of 3.0×104N/C. What is the magnitude and direction of its initial acceleration?
a) 3.0×104m/s2 downward
b) 8.8×1014m/s2 downward
c) 5.3×1015m/s2 downward
d) 5.3×1015m/s2 upward