a light horizontal spring has a spring constant of 104 n/m. a 2.01 kg block is pressed against one end of the spring, compressing the spring 0.139 m. after the block is released, the block moves 0.267 m to the right before coming to rest. the acceleration of gravity is 9.81 m/s 2 . what is the coefficient of kinetic friction between the horizontal surface and the block?