Q. A particle moves in a circular path with decreasing speed. Choose the correct statement.
A) Angular momentum remains constant
B) Acceleration (a) is towards the center
C) Particle moves in a spiral path with decreasing radius
D) The direction of angular momentum remains constant
Explanation
(d) $\mathbf{L} = m\left( \mathbf{r} \times \mathbf{v} \right)$
Direction of $\left( \mathbf{r} \times \mathbf{v} \right)$, hence the direction of angular momentum remains the same.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.