What is the minimum velocity with which a body of mass \(m\) must enter a vertical loop of radius \(R\) so that it can complete the loop?
1. \(\sqrt{2 gR}\) 

2. \(\sqrt{3 g R}\)

3. \(\sqrt{5 g R}\)

4. \(\sqrt{g R}\)

Subtopic:  Conservation of Mechanical Energy |
 79%
Level 2: 60%+
NEET - 2016
Hints
Links