Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • A mass m moves in a circle on a smooth horizontal plane with velocity v0 at a radius R0. The mass is attached to a string which passes through a smooth hole in the plane as sh

A mass m moves in a circle on a smooth horizontal plane with velocity v0 at a radius R0. The mass is attached to a string which passes through a smooth hole in the plane as shown.

The tension in the string is increased gradually and finally m moves in a circle of radius \frac{R_0}{2}. The final value of the kinetic energy is:

Option: 1

mv_0^{2}


Option: 2

\frac{1}{4}mv_0^{2}


Option: 3

2mv_0^{2}


Option: 4

\frac{1}{2}mv_0^{2}


Answers (1)

Use conservation of Angular Momentum Li=Lf

mV_{o}R_{o}=m{V}'(R_{o}/2)=V{}'=2V_{o}\\ K_{f}=\frac{1}{2}mv{}'^{2}=\frac{1}{2}m(2V_{o})^{2}=2mv_{o}^{2}

Posted by

Ramraj Saini

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

NEET 2025 exam passing marks out of 720 for MBBS aspirants
anam-khan

Sharp dip in NEET cut-off for MBBS in Tamil Nadu government medical colleges
anam-khan

NEET cut-off for MBBS dropped for Madhya Pradesh government medical colleges; 2,400 seats up for grabs

Latest Question