The Metal Ball

Here is a $2\text{ kg}$ metal ball charged negatively $(-1\text{ C}).$ It rolls on the $2.5\text{ m}$ -high plastic table, goes into the uniform electric field, and passes the point $A$ (at the end of the field and $5\text{ m}$ above the table).

Find the horizontal distance the ball travels from the left end of the electric field to the point it lands on the floor.

Details and Assumptions:

• Disregard all frictions, air resistance, and the size of the ball.
• Consider the gravitational acceleration as $g=10\text{ m/s}^2.$