Final answer:
The question pertains to a physics problem involving a two-dimensional collision between two masses, where one mass is initially moving and the other is at rest. The problem examines the post-collision velocity of the moving mass.
Step-by-step explanation:
The question involves a two-dimensional collision where a mass mA = 2.2 kg with a given velocity, collides with another mass mB = 3.8 kg, which is initially at rest. The student is tasked to understand the post-collision velocity of mass mA, which is traveling at a new velocity immediately after the collision. This scenario is typically explored in the context of conservation of momentum and, depending on the specifics of the collision, conservation of kinetic energy, which are key principles in high school physics curriculum dealing with mechanics and dynamics.