A particle is projected at a speed of u=40m/s in vertically upward direction in a place where exists a horizontal uniform electric field E0. The specific charge of the particle is 3E04g.
- Find the time after projection, when speed of the particle will be least.
- Find the time (after projection) when displacement of the particle becomes perpendicular to its acceleration.
- Assuming that the particle has been projected from a great height and the electric field is present in large region, what angle the velocity of the particle will make with horizontal after a long time?