Determinar la magnitud de la fuerza que actúa sobre una car- ga de prueba de 2 x 10-C al situarse en un punto en que
la intensidad del campo eléctrico tiene una magnitud de 6 X
10' N/C.

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.