Block with mass of m is shot from the point A with initial velocity of Vo=5m/s. Starting from point C, block experience friction force and comes to rest at point D. If the magnitude of the friction force equals to potential energy of the block at the point where the block is 6m above from the ground, find the distance CD. (h1=15m, h2=6m, g=10m/s) a)7.6m b) 3.2m c)0.7m d)4.9m e) 1.7m