A projectile is projected with a velocity`v_(0)` at an angle ` theta` with the horizontal as shown in figure. The angular momentum of particle about the origin:

Options

A. is zero when particle is at the origin
B. is `(-mv^(3) sin^(2) theta cos theta)/(2g) hatk` when particle is at the highest point of trajectory
C. is `(-2mv^(2) sin^(2) theta cos theta)/g hatk` when particle is just about to hit ground
D. downward force of gravity exerts a torque in `-z` direction.

Answer

A, B, C, D