logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Motion in a Plane
0 votes

A ball of mass m is attached to one end of a light rod of length $l$, other end of which is hinged . What minimum velocity 'v' should be imparted to the ball downwards so that it can complete the circle

\[(a)\;\sqrt {gl} \quad (b)\;\sqrt {5gl} \quad (c)\;\sqrt {3gl} \quad (d)\; \sqrt {2gl} \]

Can you answer this question?
 
 

1 Answer

+1 vote
The velocity at top most position of circle must be zero for finding minimum velocity of projection.
$v=0$
$v^2-u^2=-2gh$
$0=u^2-2gh\qquad (h=l)$
$u=\sqrt{2gl}$
Hence d is the correct answer. 

 

answered Jun 27, 2013 by meena.p
edited Jul 25, 2014 by thagee.vedartham
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...