Two blocks on a frictionless horizontal surface are on acollision course.One block with mass 0.25 kg moves at 1 m/s to theright collides with a 0.5 kg mass at rest and the two masses sticktogether. What is the final speed of the blocks after thecollision?
         a) -0.33m/s
         b) +0.33m/s
         c) 3.27m/s
         d) 0.67m/s
         e) 0.25m/s
