Two particles A and B are projected simultaneously from a fixed point of the ground. Particle A is projected on a smooth horizontal surface with speed v, while particle B is projected in air with speed v, while particle B is projected in air with speed `(2v)/(sqrt(3))`. If particle B hits the particle A, the angle of projection of B with the vertical is

Options

A. `30^(@)`
B. `60^(@)`
C. Both (a) and (b)
D. `45^(@)`

Answer

A

Explanation

Their horizontal components should be same.
`:. (2v)/(sqrt(3)) cos theta = v` or `theta = 30^(@)`