A 1.45 kg block at rest on a tabletop is attached to a horizontal spring having constant 17.7 N/m. The spring is initially unstretched. A constant 25.5 N horizontal force is applied to the object causing the spring to stretch. The acceleration of gravity is 9.8 m/s. Find the speed of the block after it has moved 0.226 m from equilibrium if the surface between block and tabletop is frictionless. Answer in units of m/s.

Find the speed of the block after it has moved 0.226 m from equilibrium if the coefficient of kinetic friction between block and tabletop is 0.157. Answer in units of m/s.