A small sphere with charge q= -5.00 C is moving in a uniform electric field that has no y- or z-component. The only force on the sphere is the force exerted by the electric field. Point A is on the x-axis at x= -0.400 m, and point B is at the origin. At point A the sphere has kinetic energy KA=8.0010-4J, and at point B its kinetic energy is KB=3.0010-4J