Kinematics Question 568

Question: A particle moves in a circular path with decreasing speed. Choose the correct statement.[IIT JEE 2005]

Options:

A) Angular momentum remains constant

B)Acceleration ($ \vec{a} $ ) it’s towards the center

C)Particle moves in a spiral path with decreasing radius

D) The direction of angular momentum remains constant

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Answer:

Correct Answer: D

Solution:

Angular momentuM is a axial vector. It’s directed always in a fix direction (perpendicular to the plane of rotation either outward or inward), if the sense of rotation remain same.



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