A mass M is moving with constant velocity parallel to x-axis. Its angular momentum about the origin

A
is zero
B
increases
C
decreases
D
remains constant
Answer:

The correct option is D. CORRECT OPTION

Note
The angular momentum is the moment of the linear momentum mv. L = r × p = mvrsinθ=mv(⊥distancefromx−axis) The ⊥ distance from the x-axis is constant. ∴ L is constant.