Question

A mass m is moving with a constant velocity along a line parallel to the x-axis, away from the origin. Its angular momentum with respect to the origin ___________

(a) Is zero

(b) Remains constant

(c) Goes on increasing

(d) Goes on decreasing

This question was posed to me during an interview for a job.

My question is based upon Moment of Inertia and its Significance in chapter System of Particles and Rotational Motion of Engineering Physics I

Answer 1

Correct option is (b) Remains constant

Explanation: Angular momentum = Mass of momentum

L = mv×h = constant

As the particle moves, m, v and h all remain unchanged.