A railway compartment is 16m long, 2.4 m wide and 3.2 m high. It is moving with a velocity v. A particle moving horizontally with a speed u, perpendicular to the direction of v, enters through a hole at an upper corner A and strikes the diagonally opposite corner B. Assume `g = 10 m//s^(2)`.

Options

A. `v = 20 m//s`
B. `u - 3 m//s`
C. To an observer inside the compartment, the path of the particle is a parabola
D. To a stationary observer outside the compartment, the path of the particle is a parabola.

Answer

A, B, D