Final answer:
'Yes'.The collision in the given situation is elastic.
Step-by-step explanation:
In an elastic collision, objects conserve both momentum and kinetic energy. To determine if a collision is elastic, we need to compare the initial and final velocities of the objects involved. If the velocities remain the same before and after the collision, it is an elastic collision. If the velocities change, it is an inelastic collision.
In the given situation, if the velocity of the heavier ball after the collision is 3.50 m/s to the right, and it was initially moving to the right, then the velocity of the ball did not change. Therefore, we can conclude that the collision is elastic.