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A spherical ball of mass 1 kg moving wit...

A spherical ball of mass `1 kg` moving with a uniform speed of `1 m//s` collides symmetrically with two identical spherical balls of mass `1 kg` each at rest touching each other. If the two balls move with `0.5 m//s` in two directions at the same angle of `60^(@)` with the direction of the first ball, the loss of kinetic energy on account of the collision is :-

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