The ratio of masses of two balls is 2 : 1 and before collision the ratio of their velocities is 1 : 2 in mutually opposite direction. After collision each ball moves in an opposite direction to its initial direction. If e = (5/6), the ratio of speed of each ball before and after collision would be
Text Solution
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Let masses of the two ball are 2m and m, and their speeds are u and 2u respectively.
By conservation of momentum
⇒ ⇒
⇒ ⇒ v 2 = 2v 1
Coefficient of restitution =
[As 
given]
⇒ ⇒ 
ratio of the speed of first ball before and after collision.
Similarly, we can calculate the ratio of second ball before and after collision, 
.
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