A 0.15 kg ball of Play-Doh is hanging from a string attached

Last updated: 7/27/2022

A 0.15 kg ball of Play-Doh is hanging from a string attached to the ceiling to that it can swing like a pendulum. A person throws a second 0.25 kg ball of Play-Doh with a velocity of 13 m/s at the swinging ball so that it impacts with and sticks to the swinging ball at the moment it swinging back towards the thrower with a velocity of 2.2 m/s. What is the velocity of the two Play-Doh balls once they are stuck together?