question_answer

A mass M is moving with a constant velocity on a line parallel to the x-axis. Its angular momentum with respect to the origin or z-axis

A)  is zero                                 

B)  remains constant

C)  goes on increasing         

D)  goes on decreasing

Correct Answer: B

Solution :

Angular momentum of particle w.r.t. origin = linear momentum\[\times \]perpendicular distance of line of action of linear momentum from origin \[=mv\times a=mva=\]constant