20 An m = 12.0 kg block is released from rest on a frictionless incline that makes an angle of 0 = 28.0', as shown in the m figure. Below the block is a spring that has a spring constant of 1.25 x 104 N/m. The block momentarily stops when it compresses the spring by 5.50 cm. How far L does the block move down the incline from its release point to the stopping point? Answer in units of centimeters. L = cm