Fundamental Constants: 9 =9.81 m/s' - standard acceleration of gravity 1. A sled starts sliding from the top of the slope or = 20 with initial velocity v. = 2.5 m/s. The sled is reaching the bottom of the slope after the time t = 12 s. Consider that the friction between the sled and the slope is a = 0.08. Ignore the air resistance during the motion. (a) Write Newton's Law of Motion and derive kinematic equations; (b) Calculate the length of the slope D; (c) Calculate the velocity of the sled in at the bottom of the slope