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.
The Sedgwick County population density is 499.23 people per square mile, which is much higher than the state average density of 35.04 people per square mile and is much higher than the national average density of 82.73 people per square mile. The most prevalent race in Sedgwick County is white, which represent 79.31% of the total population. The average Sedgwick County education level is about the same as the state average and is about the same as the national average.