An object with charge q = -7.00×10^-9 C is placed in a region of uniform electric field and is released from rest at point A. After the charge has moved to point B, 0.500 m to the right, it has kinetic energy 3.00×10^-7 J.
1) If the electric potential at point A is +30.0 V, what is the electric potential at point B?
2) What is the magnitude of the electric field?
3) What is the direction of the electric field?
a) from point B to point A
b) from point A to point B
c) perpendicular to the line AB