In the figure below, a block slides along a smooth surface until it reaches a rough surface of length L = 0.75 m starting at a height h = 2m with an angle of inclination = 0 = 30.. The coefficient of kinetic friction of the rough surface is 0.4. If the block reaches point B, what is the speed of the block at that point? If it cannot reach point B, what is the height when the block stops? B/ L CD A