In case of projectile motion, which one of the following figures represent variation of horizontal component of velocity (u_x) with time t? (Assume that air resistance is negligible)

A fighter plane, flying horizontally with a speed 360 km/h at an altitude of 500 m drops a bomb for a target straight ahead of it on the ground. The bomb should be dropped at what approximate distance ahead of the target? Assume that acceleration due to gravity (g) is 10 ms^-2. Also, neglect air drag.

Two particles are simultaneously projected in the horizontal direction from a point P at a certain height. The initial velocities of the particles are oppositely directed to each other and have magnitude v each. The separation between the particles at a time when their position vectors (drawn from the point P) are mutually perpendicular, is

At a particular height, the velocity of an ascending body is u. The velocity at the same height while the body falls freely is