The diameter of a baseball is 7.4 cm and its mass is 0.15 kg.
a) if a pitcher throws the baseball at a velocity of 44.3 m/s (100 mi/hr), estimate the drag force on the baseball as it moves through the air. assume that the surface of the baseball is smooth. express your answer in units of newtons.
b) if the pitcher throws the baseball from the pitching mound at 44.3 m/s (100 mi/hr), estimate the baseball's velocity when it crosses home plate, 18.3 m (60 ft) away. express your answer in units of m/s. this is not steady state and therefore it may be useful to start from -f_d = ma and to use the relationship u = dx/dt.