Environment: g=9.81, F_drag=!=0
Ground: e=0.5
TennisBall: d = 0.07, e = 0.75, m = 0.06, h = 0.77, v_0 = 0.0
SteelBall: d = 0.04, e = 0.6, m = 0.26, h = 0.77, v_0 = 1.12