For-a-particle-performing-uniform-circular-motion-angular-momentum-is-constant-in-magnitude-but-direction-keeps-changing-Am-I-right-or-wrong-

Question Number 21295 by Tinkutara last updated on 19/Sep/17

For a particle performing uniform

circular motion, angular momentum is

constant in magnitude but direction

keeps changing .

Am I right or wrong ?

Answered by dioph last updated on 19/Sep/17

\vec{L} = m \vec{r} \times \vec{v}

= m (r \hat{r}) \times (ω r \hat{θ})

= m ω r^{2} \hat{z}

m, ω, r are all constants and the vector

is always in the same direction \hat{z} .

Commented by Tinkutara last updated on 20/Sep/17

Thank you very much Sir!