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goldfish9776

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## Homework Statement

three small spheres, A , B and C with mass of 3kg , 4kg , 7kg respectively are arranged as shown in the figure. Initially , sphere B is placed in static condition,while the sphere A is moving with a velocity of 4u towards B and collides . Then , sphere C move to right with velocity u , the elastic coefficient between A and B is 0.75 , and B and C is 0.5, determine

the velocity of sphere A and B after the first collision . How to do this ?

3(4u) +4(0) = 3V1 +4V2

12u = 3V1 +4V2

V2 - V1 / ( U1 -U2 ) = 0.75

since U2 = 0 ,

V2 - V1 = 0.75 u

12u - 3( V2- 0.75u ) +4V2

14.25u = 7V2 , V2 = 2.035 u , V1 = 1.29u ,

is my ans correct ? i don't have the ans btw