(a) Show that when two identical spheres A and B with coefficient of restitution e =1 collide while moving with velocities vA and vB which are perpendicular to each other they will rebound with velocities v'A and v'B which are also perpendicular to each other.

(b) To verify this property, solve Sample Prob. 13.15, assuming e = 1, and determine the angle formed by v'A and v'B.

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НА 0-06 B