A baseball leaves the bat with a speed about 45 m/s which is greater than its terminal speed in air when droppeed from rest 42 m/s. the magnitude of the drag force D=b2(2 is a subscript), where D is the drag force, b is the weight (mg) of the baseball about 1.4N. When air resistance is taken into account, the range is reduced from 179m to 72m and the max height from 78m to 48m.