A 0.50-kg ball accelerates from rest at 10 m/s2 for 2.0 s. It then collides with and stick...

A 0.50-kg ball accelerates from rest at 10 m/s2 for 2.0 s. It then collides with and sticks to a 1.0-kg ball that is initially at rest. After the collision, approximately how fast are the balls going?