Direction: Read the passage carefully and answer the following question.An object of mass 1.5 kg travelling in a straight line with a velocity of \[5\text{ }m\text{ }{{s}^{-1}}\] collides with a wooden block of mass 5 kg resting on the floor.This object sticks with wooden block after collision and both move together in a straight line.The velocity of the combination of these objects after collision is

• A. \[8.5\text{ }m\text{ }{{s}^{-1}}\]               
• B. \[9.5\text{ }m\text{ }{{s}^{-1}}\]   
• C. \[1.15\,\,m\,\,{{s}^{-1}}\]    
• D. \[1.5\,\,m\,\,{{s}^{-1}}\]