Question

A particle of mass m is moving with a constant velocity parallel to the y-axis. If at t = 0 particle is at point A(2m, 0) then the angular momentum with respect to the origin on passing time [NCERT Pg. 157]
(1) Is zero
(2) Remains constant
(3) Goes on increasing
(4) Goes on decreasing

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Answer 1

Answer:

Correct option is

B

remains constant

Angular momentum L=mxv

where x is the distance of the particle on x-axis from the origin and v is the velocity. Since the particle is moving parallel to y-axis, so its distance on the x-axis from the origin remains the same and thus its angular momentum about the origin remains the same.