A block of mass m = 2.00 kg is attached to a spring of force constant k = 415 N/m as shown in the figure below. The block is pulled to a position xi = 4.05 cm to the right of equilibrium and released from rest.
(a) Find the speed the block has as it passes through equilibrium if the horizontal surface is frictionless.
m/s
(b) Find the speed the block has as it passes through equilibrium (for the first time) if the coefficient of friction between block and surface is ?k = 0.350.
m/s