A 50 kg object is moving to the right with a speed of 10 m/s
when it collides with a 20 kg object that is moving to the left
with a speed of 4 m/s. The two objects stick together during the
collision. Which of the following best describes the motion of the
two objects after they collide?
stationary (v=0)
moving to the left at a speed greater than 10m/s
moving to the left at a speed less than 10m/s
moving to the right at a speed greater than 10m/s
moving to the right at a speed less than 10m/s