1.

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

Answer»

`t = 5/2 SQRT((l^2 - a^2)/(2gh))`
`t = 5/4 sqrt((l^2 - a^2)/(2gh))`
`t = 5/2 sqrt((LA)/(2gh))`
`t = 5/4 sqrt((la)/(2gh))`

ANSWER :A


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