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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)

Badiuddin askIITians.ismu Expert
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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Badiuddin

7 years ago
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