Take the z-axis as vertical and the xy plance as horizontal .A particle A is projected at `4sqrt(2)` m/s at an angle of `45^(@)` to the horizotal , in the xz plane .Particle B is projected at 5 m/s at an angle `theta=tan^(-1)(4//3)` to the y-axis , in th yz plance . which of the following is not correct for the velocity of B With respect to A?

Options

A. Its initial magnitude is 5 m /s.
B. Its magnitude will change with time
C. it lies in the xy plane.
D. It will initially make an angle `(theta +pi//2)` with the positive x-axis.

Answer

B