question_answer

A triangular block ABC of mass m and sides 2a lies on a smooth horizontal plane as shown in figure. Three point masses of mass m each strike the block at A, B and C with speeds v as shown. After the collision the particles come to rest. Then the angular velocity acquired by the triangular block is (l is the moment of inertia of the triangular block about G perpendicular to the plane of the block)

A) \[2mva\frac{(1+\sqrt{3})}{\sqrt{3}/}clockwise\]

B) \[\frac{2mva}{l}clockwise\]

C) \[\frac{2\sqrt{3}mva}{l}clockwise\]

D) None of these