A particle of mass 4 105 kg and charge 3 C moves downward from point A to point B a distance of 2 m in the earth's gravitational field. The kinetic energy of the particle decreases by 1.7 mJ during this movement. What is the potential difference VB VA? The acceleration of gravity is 9.8 m/s 2 . Answer in units of kV. (NOTE: The answer is NOT 0.8 kV)