posted by Tina .
A 0.200kg ball moves with a velocity of 0.3m/s. It collides with a second ball that is at rest and has a mass of 0.1kg. After the collision, the velocity of 0.1kg ball is 0.26m/s. What is the new velocity of the first ball.
Please indicate which equation you use, what variable corresponds to each number, and how you got the number that goes with the variable.