Clint Dempsey takes a free kick and kicks a soccer ball with a mass of 440 grams at 98 miles per hour. what is the momentum

in MKS units,

.440kg * 98 mi/hr * 1000m/0.62mi * 1hr/3600s = .440*98*1000 / .62*3600 m/s = 19.32 kg-m/s