A point charge with charge q1 = 3.90 μC is held stationary at the origin. A second point charge with charge q2 = -4.20 μC moves from the point ( 0.120 m , 0) to the point ( 0.275 m , 0.245 m ). How much work W is done by the electric force on the moving point charge?

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.