Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A disc of mass and radius <img alt="\mathrm{R}" src="https://entrancecorner.oncodecogs.com/gif.latex?

A disc of mass \mathrm{m} and radius \mathrm{R} moves in the \mathrm{x-y} plane as shown in figure. The angular momentum of the disc about the origin \mathrm{' O '} at the instant shown is. -


 

Option: 1

\mathrm{\frac{-5}{2} m R^2 \omega \hat{k}}
 


Option: 2

\mathrm{\frac{7}{2} m R^2 m \hat{k}}
 


Option: 3

\mathrm{\frac{-9}{2} m R^2 \omega \hat{k}}
 


Option: 4

\mathrm{\frac{5}{2} m R^2 \omega \hat{k}}


Answers (1)

best_answer

\mathrm{ \overrightarrow{L}=m\left(\overrightarrow{\gamma} \times \overrightarrow{v}_{c m}\right)+I_{c m} \overrightarrow{\omega} }

\mathrm{ \overrightarrow{L}=-m v r \sin \theta(\hat{k})+\frac{m R^2}{2} \omega \hat{k} }

\mathrm{ \overrightarrow{L}=-m v r \times \frac{3 R}{r} \hat{k}+\frac{m R^2}{2} \omega \hat{k} }

\mathrm{ L=-m(\omega R) 3 R \hat{k}+\frac{m R^2}{2} \omega \hat{k} }

\mathrm{ \overrightarrow{L}=\frac{-5}{2} m R^2 \omega \hat{k} }

Hence option 1 is correct.



 

Posted by

seema garhwal

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

'Years of hard work wasted': NEET aspirants, parents and teacher react to exam cancellation
anam-khan

CBI registers FIR in alleged NEET UG 2026 paper leak case after NTA cancels examination
anam-khan

Telangana doctors’ group, FAIMA condemn NEET UG 2026 paper leak, call it ‘complete systemic failure’

Latest Question