A particle moves in a circular path with decreasing speed, choose the correct statement…

Q: A particle moves in a circular path with decreasing speed, choose the correct statement

(a)Angular momentum remains constant

(b)Acceleration ($\vec{a}$ ) is towards the centre

(c)Particle moves in a spiral path with decreasing
radius

(d)The direction of angular momentum remains
constant

Ans: (d)

Sol: Angular Momentum $\large \vec{L} = \vec{r}\times \vec{p}$

$\large \vec{L} = m(\vec{r}\times \vec{v})$

Hence , the direction of angular momentum remains
constant