A particle is moving in the xy-plane with a constant velocity along a line parallel to the X-axis away from the origin. The magnitude of its angular momentum about the origin.

Options

A. is zero
B. remains constant
C. goes on increasing
D. goes on decreasing

Answer

B

Explanation

Angular momentum=(Linear momentum)`xx`(perpendicular distance of line of motion from the axis).
or angular momentum is the moment of momentum. Here, the moment of momentum. Here, the angle goes on decreasing from `90^(@)` but the perpendicular distance to the line of motion remains constant. therefore, angular momentum is also constant (linear momentum p=mv is constant).