A basketball player jumps straight up for a ball. To do this, he lowers his body 0 . 3 1 5 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0 . 8 9 5 m above the floor. ( a ) Calculate his velocity ( in m / s ) when he leaves the floor. m / s ( b ) Calculate his acceleration in m / s 2 , while he is straightening his legs. He goes from zero to the velocity found in part ( a ) in a distance of 0 . 3 1 5 m . m / s ( c ) Calculate the force ( in N ) he exerts on the floor to do this, given that his mass is 1 1 4 kg .