A point-like body of mass m and of charge Q is initially at rest on the horizontal tabletop as shown in the figure and is given a v₀ vertical, upward speed. There is a horizontal electric field E. Acceleration due to gravity = g.

At the highest point acceleration will be only in horizontal direction.

Maximum height attained $=\frac{{\mathrm{v}}_0^2}{2\mathrm{g}}$

Particle will collide with the table at horizontal distance $\frac{2{\mathrm{QEv}}_0^2}{{\mathrm{mg}}^2}$

Particle will collide with the table at an angle $\tan \mathrm{\theta }=\frac{\mathrm{mg}}{2\mathrm{QE}}$with horizontal.