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.
At the time of the 2010 Census, Dillwyn had a population of 447 people. This makes Dillwyn the county's most populous community. With a 2010 count of 447 people, the population of Dillwyn has remained roughly the same as the 2000 Census (with a count of 447 people). Taken from the 2016 Census Estimates, Dillwyn had an population of 445 people.