A particle $$\(B\)$$ of mass $$\(5 \mathrm{~kg}\)$$ is at rest on a smooth horizontal table. A particle $$\(A\)$$ of mass $$\(2.5 \mathrm{~kg}\)$$ moves on the table with a speed of $$\(6 \mathrm{~m} \mathrm{~s}^{-1}\)$$ and collides directly with $$\(B\)$$. In the collision the two particles coalesce. Find the speed of the combined particle after the collision. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................

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