A large sphere (I=2/5mr^2) rolls without slipping ( pure rolling) across a horizontal surface. The sphere has a constant translational velocity of 10 m/s, a mass of 25 kg, and a radius of .2 m. The sphere approaches the 25 degree incline of height 3 m, and rolls up the incline without slipping. a. Find the initial KE (translation and rotation). b. Find the velocity at the top of the incline.