Momentum is conserved in case of motion under gravity because a object is pulled by the earth and the earth of pulled by the object. The momentum terms of the object and earth cancel each other out as the object has small mass but high velocity and the earth has very high mass and very small velocity in the opposite direction of the velocity of the object.
Southwick, Massachusetts. Southwick is a town in Hampden County, Massachusetts, United States. The population was 9,502 at the 2010 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.
Sedgwick County Population and Races. As of 2010-2014, the total population of Sedgwick County is 503,788, which is 11.24% more than it was in 2000. The population growth rate is higher than the state average rate of 7.24% and is about the same as the national average rate of 11.61%.