A bullet of mass m strikes a pendulum bob of mass M with velocity u. It passes through and emerges out with a velocity u/2 from bob. The length of the pendulum is l. What should be the minimum value of u if the pendulum bob will swing through a complete circle?

A bullet of mass m strikes a pendulum bob of mass M with velocity u. I

1.	A bullet of mass m strikes a pendulum bob of mass M with velocity u. It passes through and emerges out with a velocity u/2 from bob. The length of the pendulum is l. What should be the minimum value of u if the pendulum bob will swing through a complete circle?
Answer» `(2M)/mxxsqrt(5gl)` `M/(2m)SQRT(5gl)` `(2M)/mxx1/sqrt(5gl)` `M/(2m)xx1/sqrt(5gl)` ANSWER :A