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Two mass m(1) and m(2) are connected by ...

Two mass `m_(1)` and `m_(2)` are connected by string of length l. They are held in a horizontal plane at a height H above two heavy plates A and B made of different materials placed on the floor. Initially, the distance between the two masses is a < l. When the masses are released they fall freely and collide with the plates simultaneously. The coefficient of restitution for the first ball-plate pair is 0.8 and for the second ball-plant pair is 0.4. The time after collision when the string becomes taut is

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))`

Text Solution

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The correct Answer is:
A
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