13. A spring with a spring constant of 1,200 N/m is compressed to x = 50.0 cm and released. The spring propels a 20.0 kg block across a horizontal surface that is frictionless except for a rough patch that is d = 5.00 m long with a coefficient of kinetic friction of 0.100. The block briefly slides up a frictionless 30.0° incline before sliding back down. (a) How far along the incline does the block go before it slides back down? (b) What is the maximum vertical distance the block reaches?

13. A spring with a spring constant of 1,200 N/m is compressed to x = 50.0 cm and released. The spring propels a 20.0 kg block across a horizontal surface that is frictionless except for a rough patch that is d = 5.00 m long with a coefficient of kinetic friction of 0.100. The block briefly slides up a frictionless 30.0° incline before sliding back down. (a) How far along the incline does the block go before it slides back down? (b) What is the maximum vertical distance the block reaches?