A 6 kg block free to move on a horizontal, frictionless surface is attached to a spring. The spring is compressed 0.16 m from equi- librium and released. The speed of the block is 1.44 m/s when it passes the equilibrium po- sition of the spring. The same experiment is now repeated with the frictionless surface re- placed by a surface with coefficient of friction 0.1.

Determine the speed of the block at the equilibrium position of the spring. The accel- eration due to gravity is 9.8 m/s2 .