A 3.0 kg object moving at 8.0 m/s in the positive direction

Last updated: 8/1/2022

A 3.0 kg object moving at 8.0 m/s in the positive direction of an x axis has a one- dimensional elastic collision with an object of mass M, initially at rest. After the collision the object of mass M has a velocity of 6.0 m/s in the positive direction of the axis. What is mass M?