Two masses `m_(1)`, and `m_(2)` are connected by a string of length L. They are held in horizontal plane at a height H above two fixed heavy plates A and B made of different material placed on the floor. Initially distance between two masses is `altL`. When the masses are released under gravity they make collision with A and B with co-efficient of resitution 0.8 and 0.4 respectively. The time after collision when the string becomes tight is

Options

A. `t = 5/2 sqrt((l^2 - a^2)/(2gh))`
B. `t = 5/4 sqrt((l^2 - a^2)/(2gh))`
C. `t = 5/2 sqrt((la)/(2gh))`
D. `t = 5/4 sqrt((la)/(2gh))`

Answer

A