Asmall styrofoam ball with a layer of metallic coating is lowered into the gap between two large metal plates. a large potential difference v is kept between the two plates. what will be the motion of the styrofoam ball

ball will oscillate in between the plates

Explanation:

The metallic coated styrofoam lowered in between two large metal plates, a large potential difference V is kept between the two plates, will experience a force of repulsion ( because both plates and balls will have similar kind of charges and like charges repel each other)  from the opposite plates.

If we consider d as the distance between the plates, E as electric field because of Potential difference V. Then force F experience by the ball will be

where q be the total charge on the metallic coated ball.

clearly,  since, both the plates will repel the ball in opposite directions, hence ball will be in oscillate in between the plates.

he kicked it 10 feet straight up into the air? i think this works.

if they have a finite resultant