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Two spherical balls of masses m1 and m2 ...

Two spherical balls of masses m1 and m2 collide as shown in figure. After collision mass m1 moves with velocity u/3 in a direction perpendicular to original direction. The angle `theta` at which mass m2 will move after collision is

A

`tan^-1(1/2)`

B

`tan^-1(1/3)`

C

`tan^-1(2/3)`

D

`tan^-1(3)`

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