A particle has a charge of +1.5 uC and moves from point a to point b, a distance of 0.20 m. The particle experiences a constant electric force, and its motion is along the line of action of the force. The difference between the particle's electric potential energy at A and at B is EPEₐ - EPEᵦ = +9.0e⁻⁴ J.
(a) Find the magnitude and direction of the electric force that acts on the particle.
