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sindhuja P Grade: 11
```        Two identical balls of equal masses A & B,arelying on a smooth surface with ball A behind ball B.Ball A hits the ball B(which is at rest) with a velocity v=16 m/s.What should be the minimum value of coefficient of restituion e between A and B so that B just reaches the highest point of inclined plane which is 5m high?Here ball B is near to inclined plane.
```
7 years ago

## Answers : (1)

147 Points
```										Dear sindhuja
initial velocity of A = 16
initial velocity of B = 0
let velocity of A after collision =Va
let velocity of B after collision =Vb
1/2 m Vb2=mg*5
Vb=10 m/sec
conservation of moment
m*16 +m*0 =m*Va +m*10
Va=6 m/sec
now e =ve,ocity of seperation /velocity of apporoch
=(10-6) /16
=1/4
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7 years ago
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