Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • A circular plate is rotating horizontal plane, about an axis passing through its center perpendicular to the plate, with an angular velocity <img alt="\omega" src="https://entrancecorner.oncodecogs

A circular plate is rotating horizontal plane, about an axis passing through its center perpendicular to the plate, with an angular velocity \omega. A person sits at the center having two dumbbells in his hands. When he stretches out his hands, the moment of inertia of the system becomes triple. If \mathrm{E} be the initial Kinetic energy of the system, then final Kinetic energy will be \frac{E}{x}. The value of x is

Option: 1

3


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)

best_answer

\mathrm{I}_{1} \omega_{1}=\mathrm{I}_{2} \omega_{2}
\mathrm{I} \omega=3 \mathrm{I} \omega_{2}
\omega_{2}=\frac{\omega}{3}
E=\frac{1}{2} I\omega^{2}
E_{f}=\frac{1}{2} \times 3 \mathrm{I} \times\left(\frac{\omega}{3}\right)^{2}=\frac{\frac{1}{2} \mathrm{I} \omega^{2}}{3}
x=3

Posted by

Ritika Harsh

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main 2025: BTech ECE cut-offs for female candidates go up at top NITs
anam-khan

JEE Main 2025 Session 2 City Slip (OUT) Live: Admit card likely on March 29 at jeemain.nta.nic.in; cut-offs
anam-khan

AESL expands Aakash Digital 2.0 to offer AI-powered coaching for NEET, JEE, Olympiads

Latest Question