A block of mass 1.6kg is attached to a horizontal spring that has a force constant 1.0*103 N/m as shown in the figure. The spring is compressed 2.0cm and is thenreleased from rest. Calculate a) Speed of the block as it passes through the equilibrium position x=0 if the surface is frictionless. b) Calculate the speed of the block as it passes through the equilibrium position if a constant frictional force of 4.0N retards its motion from the moment it is released.
